A system and method includes determination of first image metrics of a first image of a phantom, the first image generated by a first imaging system based on first image formation parameters, and the first imaging system and first image formation parameters associated with a plurality of reference images, generation of a plurality of images of the phantom, each of the plurality of images generated using different respective image formation parameters, determination of second image metrics for each of the plurality of generated images, identification of one of the plurality of generated images based on the first image metrics and the second image metrics for each of the plurality of generated images, generation of an image of an object using the image formation parameters used to generate the identified one of the plurality of generated images, and comparison of the generated image of the object to one or more of the plurality of reference images.
For emission tomography, a greater number of emissions are detected. To detect a greater number of emissions and provide better resolution than provided by a parallel hole collimator, the collimator is replaced by an attenuation object with exterior and interior edges. Rather than enforcing directionality, larger holes with different shapes may be used to allow a greater number of emissions to be detected. By moving the attenuation object, the differences in the shadows on the sensor may be used as a time-encoded aperture to reconstruct the source of emissions with greater resolution and sensitivity than where a fixed parallel hole collimator is used.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
G06T 5/50 - Amélioration ou restauration d'image en utilisant plusieurs images, p.ex. moyenne, soustraction
OTTAWA HEART INSTITUTE RESEARCH CORPORATION (Canada)
Inventeur(s)
Casey, Michael, E.
Dekemp, Robert
Abrégé
A system and method include acquisition of emission data from an object while a radioactive tracer is present in the object, determination of first parameters of a first Gaussian distribution representing a positron range distribution of the radioactive tracer, determination of second parameters of a second Gaussian distribution associated with imaging characteristics of the imaging system, generation of a system matrix based on the first parameters and the second parameters, reconstruction of a three-dimensional image based on the emission data and the system matrix, and display of the three-dimensional image.
Systems and methods of generating improved resolution histo-images are disclosed. A system includes a positron emission tomography (PET) imaging modality configured to execute a first scan to acquire a first PET dataset and a processor configured to back-project the first PET dataset to generate a first histo-image having a first resolution, input the first histo-image to a trained neural network, receive a second histo-image from the trained neural network, and input the second histo-image to a reconstruction process configured to generate a reconstructed PET image. The second histo-image has a second resolution higher than the first resolution. The second histo-image represents the first PET dataset.
For robotically operating multiple catheters, a common interface is used for control of two or more different catheter robotics systems. Information is used from one catheter robotic system for control of the other robotic catheter system. The common interface provides for collaborative control. Since different robotic systems may be used for different catheters, the common interface allows for the same user input and control to be translated for robotic control using any of various catheters.
A61B 8/00 - Diagnostic utilisant des ondes ultrasonores, sonores ou infrasonores
A61B 34/32 - Robots chirurgicaux opérant de façon autonome
A61B 34/35 - Robots chirurgicaux pour la téléchirurgie
A61B 34/20 - Systèmes de navigation chirurgicale; Dispositifs pour le suivi ou le guidage d'instruments chirurgicaux, p.ex. pour la stéréotaxie sans cadre
A61B 34/00 - Chirurgie assistée par ordinateur; Manipulateurs ou robots spécialement adaptés à l’utilisation en chirurgie
6.
INTERPOSER FOR SEMICONDUCTOR-BASED SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY DETECTOR
For testing or production of a semiconductor-based detector in SPECT, an interposer, such as elastomeric device with conductors, is sandwiched between a carrier and the semiconductor detector. The conductors allow for temporary separate connections of detector electrodes to signal processing circuitry, providing for testing of the detector operating with the signal processing circuitry. The interposer provides separate electrical connections for testing but may also be used in a final, fully integrated detector for use in a SPECT system.
G01R 31/20 - Préparation des articles ou des spécimens pour faciliter le test
G01R 31/26 - Test de dispositifs individuels à semi-conducteurs
G01R 31/309 - Test sans contact utilisant des rayonnements électromagnétiques non ionisants, p.ex. des rayonnements optiques de circuits imprimés ou hybrides
G01T 1/24 - Mesure de l'intensité de radiation avec des détecteurs à semi-conducteurs
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
A system and method include generation of a first tomographic image of a subject based on first gamma rays detected by the detector while the detector is disposed at a first position with respect to the subject, generation of a second tomographic image of the subject based on second gamma rays detected by the detector while the detector is disposed at a second position with respect to the subject, identification of one or more structures of the subject depicted in the first tomographic image and the second tomographic image, and generation of a composite tomographic image based on the first tomographic image, the second tomographic image, and the identified one or more structures.
For larger FOV in a gamma camera, multiple solid-state detectors are tiled. The edge pixels of the pixelated detectors are smaller than interior pixels so that the pitch of the pixels or anodes is constant across the tiled detectors. The constant pitch occurs where pairs of edge pixels combined from different detectors contribute the pitch or area of an interior pixel. As a result of this optimized edge pixel pairing and corresponding regular pitch across the tiles, the spectral and other performance is less degraded.
H01L 27/14 - Dispositifs consistant en une pluralité de composants semi-conducteurs ou d'autres composants à l'état solide formés dans ou sur un substrat commun comprenant des composants semi-conducteurs sensibles aux rayons infrarouges, à la lumière, au rayonnement électromagnétique d'ondes plus courtes ou au rayonnement corpusculaire, et spécialement adaptés, soit comme convertisseurs de l'énergie dudit ra
H01L 27/144 - Dispositifs commandés par rayonnement
A neural network (16) operating on volume data and using convolutional layers (24) may better classify conversion or Alzheimer's disease. The neural network (16) may be trained to operate on incomplete data. The neural network (16) may have a branching architecture (30-34) for more accurate classification given a variety of types of available data (20, 21) for a given patient.
G16H 50/20 - TIC spécialement adaptées au diagnostic médical, à la simulation médicale ou à l’extraction de données médicales; TIC spécialement adaptées à la détection, au suivi ou à la modélisation d’épidémies ou de pandémies pour le diagnostic assisté par ordinateur, p.ex. basé sur des systèmes experts médicaux
10.
METHOD AND SYSTEM FOR TESTING FUNCTIONALITY OF A SOFTWARE PROGRAM USING DIGITAL TWIN
A method and system for testing functionality of a software program based on at least one modification to a software code of the software program. In one embodiment, the method includes receiving software code of software program from one or more sources. The method includes identifying functions within the software code of the software program affected by the modification of software code. Further, the method includes simulating the identified functions of the software program using digital twin. Further, the method includes determining workflows of the software program based on the simulation of digital twin. The method includes identifying at least one impacted workflow from determined workflows based on one or more requirements of software program. Further, the method includes executing at least one impacted workflow critical to the functionality of the software program for testing the functionality of software program.
In a robotic or even manually controlled catheter, more direct connection of the force application (e.g., actuators) is provided from the handle to the tendons. The actuators are part of the handle. To avoid discarding the actuators after each use, the handle with the actuators is separable from a housing for the tendons. The housing for the tendons includes a clamp to hold the tendons in place prior to connecting with the handle and actuators.
A cooling system for cooling a component of an imaging system located in a scan room. The system includes inlet, outlet and return channels. A portion of warm outlet air from a component outlet flows in the return channel to provide warm recirculated air to a mixing zone in the inlet channel. A fan located in the inlet channel draws scan room air into the inlet channel to mix with the warm recirculated air in the mixing zone to form mixed air that flows over the component to cool the component and wherein the mixed air absorbs heat that warms the mixed air to form the warm outlet air. A valve located in the return channel restricts or allows additional warm recirculated air to flow to the mixing zone to mix with the scan room air to maintain a desired control temperature for the cooling system.
Various systems and computer-implemented methods for high sensitivity continuous bed motion (HS-CBM) scans are disclosed. A HS-CBM scan protocol comprising at least a first zone and a second zone is calculated. The HS-CBM scan maximizes scan sensitivity within an area of interest. A moveable bed is operated at a first movement rate within an imaging field of view of an imaging modality. The first movement rate corresponds to the first zone. The moveable bed is operated at a second movement rate within the imaging field of view of the imaging modality. The second movement rate corresponds to the second zone. A medical image is generated using scan data obtained in the first zone and the second zone.
A framework for visual explanation of classification. The framework trains (204) a generative model to generate new images that resemble input images but are classified by the classifier as belonging to one or more alternate classes. At least one explanation mask may then be generated (206) by performing optimization based on a current input image and a new image generated by the trained generative model from the current input image.
A patient handling system (PHS) for a medical imaging system having a tunnel that extends through at least one scanning portion of the system. The PHS includes a first moveable pedestal that supports a detachable first pallet that includes a first patient. The first pedestal moves the first pallet through the tunnel to enable scanning of the first patient. The PHS also includes a second moveable pedestal located at a tunnel exit. The second pedestal attaches to the first pallet as the first pallet moves through the tunnel and the first pedestal subsequently detaches from the first pallet. The second pedestal then moves away from the tunnel exit to remove the first pallet from the tunnel. A second patient to be scanned is simultaneously prepared for scanning on a second pallet as the first pallet is moved through the tunnel in order to increase patient throughput through system.
A gantry tube for a medical imaging system. The gantry tube includes a first tube located within a second tube, wherein the first tube is oriented about a longitudinal axis of the system. The gantry tube also includes a plurality of wall elements that extend between the first and second tubes, wherein the walls and first and second tubes form a plurality of channels that extend in an axial direction substantially parallel to the longitudinal axis wherein each channel is configured to hold a detector of the system. A detector is inserted into or removed from an associated channel in an axial direction from either a first end or a second end of the gantry tube.
A61B 5/055 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques; Mesure utilisant des micro-ondes ou des ondes radio faisant intervenir la résonance magnétique nucléaire [RMN] ou électronique [RME], p.ex. formation d'images par résonance magnétique
A61B 6/00 - Appareils pour diagnostic par radiations, p.ex. combinés avec un équipement de thérapie par radiations
17.
IMPROVED ATTENUATION MAP GENERATED BY LSO BACKGROUND
Various systems and computer-implemented methods for background radiation based attenuation correction are disclosed. Nuclear scan data including scan data associated with a first imaging modality and background radiation data are received. An initial background radiation attenuation map is generated and provided to a trained model configured to generate a final background radiation based attenuation map from the initial background radiation attenuation map. Attenuation correction of the scan data associated with the first imaging modality is performed based on the background radiation based attenuation map and a nuclear image is reconstructed from attenuation corrected scan data associated with the first imaging modality.
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
18.
SYSTEM AND METHOD TO ESTIMATE ATTENUATION CORRECTION FOR REPEATED SCANS AND LOW DOSE SCANS IN LONG AXIAL FOV PET SCANNERS
Various systems and computer-implemented methods for background radiation based attenuation correction are disclosed. A first set of nuclear scan data including first scan data associated with a first imaging modality having a long-axial field of view and first background radiation data is received and a first background radiation attenuation map is generated by applying a trained machine-learning model to the first background radiation data. A first set of attenuation corrected scan data is generated by performing attenuation correction of the first scan data based only on the first background radiation attenuation map and a first image is reconstructed from the first set of attenuation corrected scan data. The disclosed background radiation based attenuation correction may be used for longer duration scans, repeat scans, and/or low-dose clinical applications, such as pediatric applications, theranostics, and/or other suitable applications.
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
A61B 5/00 - Mesure servant à établir un diagnostic ; Identification des individus
For dosimetry, a miniaturized nuclear imaging system with a solid-state detector is used to determine the activity and/or injected dose for a radiopharmaceutical. By being sized to scan the syringe or vial, the injected dose may be determined using the solid-state detector with greater accuracy than current dose calibrators and with less frequent use of a calibrated or standardized source. This miniaturized nuclear imaging system reconstructs activity in a same way as the nuclear imaging system scanning a patient, so may be used to calibrate the dose model. A tissue mimicking object with a solid-state dosimeter measures dose from the radiopharmaceutical, which dose is used to calibrate the dose model.
A PET system for a PET/MRI machine is disclosed. The PET system includes a PET detector assembly arranged to form a single gap aligned with the high-density support structure assembly and the shielded cable assembly that run along the patient bed in the PET/MRI machine. The PET detector arrangement maximizes the allowable diameter of the PET system within the MR magnet and ensures that the high-density material does not interfere with image acquisition. Further, various image reconstruction techniques compatible with the PET detector arrangement are described.
PET imaging (406) accounts for attenuation by MR hardware (110). A camera (112) captures the MR hardware (110) as positioned on or by the patient (116). For example, MR local coils to be or as positioned between the emission sources in the patient (116) and the PET detector are optically imaged (402). Image processing is used to determine (404) the position of the MR hardware (110). The attenuation of the MR hardware (110) is accounted for in attenuation correction for PET imaging (402) based on the determined position.
A61B 5/055 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques; Mesure utilisant des micro-ondes ou des ondes radio faisant intervenir la résonance magnétique nucléaire [RMN] ou électronique [RME], p.ex. formation d'images par résonance magnétique
A61B 6/00 - Appareils pour diagnostic par radiations, p.ex. combinés avec un équipement de thérapie par radiations
22.
COOLING CHANNEL WITH NON-METALLIC HEAT SINK FOR A DIAGNOSTIC MEDICAL IMAGING APPARATUS
A cooling channel in a gantry of a medical imaging apparatus transfers heat away from the radiation detector and detector electronics, while limiting influence on magnetic fields generated within the gantry, when incorporated in a magnetic resonance imaging (MRI) system. The cooling channel includes a non-electrically conducting, non-metallic housing in conductive thermal communication with the detector electronics and the radiation detector. A cooling conduit in the housing circulates coolant fluid. A unitary, non-electrically conductive, non-metallic heat sink in the housing is in direct conductive, thermal communication with the housing and the cooling conduit. A solid, thermally conductive layer is interposed between and affixed to opposing, spaced exterior surfaces of the conduit and the heat sink
A61B 5/055 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques; Mesure utilisant des micro-ondes ou des ondes radio faisant intervenir la résonance magnétique nucléaire [RMN] ou électronique [RME], p.ex. formation d'images par résonance magnétique
A61B 6/00 - Appareils pour diagnostic par radiations, p.ex. combinés avec un équipement de thérapie par radiations
G01R 33/38 - Systèmes pour produire, homogénéiser ou stabiliser le champ magnétique directeur ou le champ magnétique à gradient
23.
COOLING SYSTEM WITH SOLID MATERIAL HEATSINK FOR A DIAGNOSTIC MEDICAL IMAGING APPARATUS
A gantry cooling system of a diagnostic medical imaging apparatus transfers apparatus-generated heat, such as gantry heat, to a solid material heatsink, via a circulating-fluid coolant conduit. In some embodiments, the heatsink is incorporated in the ground or within the building structure housing the apparatus.
A system and method include acquisition of positron emission tomography data of an object while a radiation source moves within the object, determination of a plurality of locations within the object, each of the plurality of locations associated with a respective time at which the radiation source was located at the location, determination of a respective time period associated with each of the plurality of locations, determination, for each of the determined time periods, of a frame of the positron emission tomography data associated with the determined time period, and, for each frame of the positron emission tomography data, generation of an image based on the frame and on the location associated with the time period associated with the frame.
A medical imaging system that includes a gantry having an inner bore surface that defines a bore for receiving a patient, wherein a digital display is attached to the inner bore surface of the bore. The system also includes a patient bed for moving the patient into the bore. Further, visual content is displayed on the display that has a calming effect on the patient.
A61B 6/00 - Appareils pour diagnostic par radiations, p.ex. combinés avec un équipement de thérapie par radiations
G01R 33/28 - Dispositions ou appareils pour la mesure des grandeurs magnétiques faisant intervenir la résonance magnétique - Détails des appareils prévus dans les groupes
26.
MODULAR, SCALABLE COOLING SYSTEM FOR A DIAGNOSTIC MEDICAL IMAGING APPARATUS
A fluid coolant system for a gantry of a medical imaging apparatus cools scalable detector electronic assemblies (DEAs) within the gantry. Each DEA includes therein a first chill plate for cooling detector elements and a second chill plate for cooling electronic components and power supplies. Coolant flow cascades sequentially through the first chill plate and then through the second chill plate. Plural DEAs in an interconnected chain cascade coolant in sequence through all their first chill plates, before cascading the coolant through all their second chill plates. A matrix of the scalable DEAs are circumferentially and axially oriented within the imaging system's gantry, for any axial length scanning field of the imaging apparatus.
A61B 5/055 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques; Mesure utilisant des micro-ondes ou des ondes radio faisant intervenir la résonance magnétique nucléaire [RMN] ou électronique [RME], p.ex. formation d'images par résonance magnétique
A61B 6/00 - Appareils pour diagnostic par radiations, p.ex. combinés avec un équipement de thérapie par radiations
G01R 33/38 - Systèmes pour produire, homogénéiser ou stabiliser le champ magnétique directeur ou le champ magnétique à gradient
27.
COOLING SYSTEM INTEGRATED WITHIN MODULAR, DETECTOR ELECTRONIC ASSEMBLY FOR A DIAGNOSTIC MEDICAL IMAGING APPARATUS
A fluid coolant system for a gantry of a medical imaging apparatus cools scalable detector electronic assemblies (DEAs) within the gantry. Each DEA includes within its modular housing a first chill plate thermally conductively coupled to cooling detector elements therein and a separate, second chill plate thermally conductively coupled to other electronic components therein, such as electronic circuit boards and/or power supplies. In some embodiments, the first chill plate is oriented between the detector elements and the second chill plate, for thermally isolating the detector elements from other heat dissipating components within the DEA. In some embodiments, coolant flow cascades sequentially through the first chill plate and then through the second chill plate.
Provided is a PET scanner system having a PET scanner gantry that is configured for delivering a uniformly distributed cooling air to a plurality of detectors housed in the PET scanner gantry. The PET scanner gantry includes a cooling air delivery manifold that includes a patient tunnel portion; and a front funnel portion. The front funnel portion includes an annular interior wall defining an entry opening of the patient tunnel portion; and an air plenum has an annular structure for carrying a flow of pressurized cooling air received from a remote source supplements the pressurized cooling air with a supply of ambient air and directs it to the plurality of detectors.
Systems and methods of PET attenuation correction using low-field MR image data includes receiving a first set of image data and a set of low-field magnetic resonance (MR) image data. An attenuation correction map is generated from the low-field MR image data using a first trained neural network. At least one attenuation correction process is applied to the first set of image data based on the attenuation correction map to generate at least one clinical attenuation-corrected image.
Disclosed is a novel method of obtaining transmission scan data in a PET scanner by incorporating one or more stationary gamma-ray sources that provide forward scattered gamma-photons that can be used as transmission imaging radiation.
The present invention relates to a pharmaceutical composition comprising a radiohybrid agent containing a silicon-fluoride and a chelating group wherein either the fluorine is 18F or the chelating group contains a chelated radioactive metal, wherein the composition has a pH of 4.0-6.0 and further comprises: 0.1-200 mM citrate buffer; 1-100 mg/mL ethanol; and 5-10 mg/mL sodium chloride.
Systems and methods for reconstructing medical images are disclosed. Measurement data, such as magnetic resonance (MR) data and positron emission tomography (PET) data, is received from an image scanning system. Attenuation maps are generated based on the PET data and a determined background level of radiation of the image scanning system. The background level of radiation can be caused by the radioactive decay of crystal material of the image scanning system. MR images are reconstructed based on the MR data. Further, a neural network, such as a deep learning neural network, is trained with the attenuation maps and the reconstructed MR images to determine attenuation map based on a reconstructed MR image. The trained neural network can be applied to MR data received for a patient to determine a corresponding attenuation map. A final image is generated based on PET data received for the patient and the determined attenuation map.
A PET imaging system includes a gantry having a patient tunnel and a first detector unit and a second detector unit housed inside the gantry, each including a plurality of detector elements in a helical arrangement around an axial axis of the imaging system. Each of the detector elements in the second detector unit is spaced apart from a corresponding detector element in the first detector unit by an axial gap. Each detector element has an axial position. Each of the first and second detector units has its detector elements arranged so that a set of the detector elements is positioned such that each detector element in the set is offset from an adjacent detector element in the detector unit such that a maximum difference between axial positions of detector elements in each detector unit is less than or equal to the axial gap.
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
34.
PET IMAGING USING MULTIPLE ORGAN SPECIFIC SHORT CT SCANS
A method of minimizing a patient's exposure to CT scan radiation during the mu-map generation process in a long axial field of view (FOV) PET scan includes performing a long axial FOV PET scan on a patient; performing one or multiple truncated FOV CT scan of a region in the patient's body in which the organs of interest lies; generating a truncated mu-map covering the truncated CT FOV; and generating a mu-map for the whole long axial FOV of the PET scan by extending the truncated mu-map generated from the truncated FOV CT scan by estimating the missing mu-map data using the PET data.
A system and method include localization of a first frame of positron emission tomography data acquired by an imaging device to a first frame of Cartesian data, generation of a first Cartesian image volume based on the first frame of Cartesian data, display of the first Cartesian image volume, localization of a second frame of positron emission tomography data acquired by the imaging device to a second frame of Cartesian data, generation of a second Cartesian image volume based on the second frame of Cartesian data, and display of the combined Cartesian image volume.
A method for performing a partial scan of a patient using a PET/CT system includes receiving a selection of a region of interest for scanning and performing a CT scan over a region of interest with the PET/CT system to acquire raw CT data. The raw CT data is reconstructed into one or more CT images. The PET/CT system is configured to limit data collection to the region of interest. A PET scan limited to a region of interest is performed with the PET/CT system to acquire raw PET data. The raw PET data is reconstructed into one or more PET images of the region of interest.
A system and method include training of an artificial neural network to generate an output three-dimensional image volume based on input two-dimensional projection images, the training based on a plurality of subsets of two-dimensional projection images of each of a plurality of sets of two-dimensional projection images and associated ones of three-dimensional image volumes reconstructed from each of the plurality of sets of two-dimensional projection images.
For parametric ultrasound imaging with an ultrasound scanner, the values for multiple parameters are determined for tissue of a patient using ultrasound. The determination may be in response to a single activation, avoiding the user having to reconfigure and activate separately for each parameter. To assist in diagnosis, one or more indicators of quality of the measurements of the parameters are calculated and displayed to the user. To further assist in diagnosis, the measurement values for the patient are displayed relative to published or population values.
Systems and methods for image reconstruction based on modeling image formation as one or more neural networks. In accordance with one aspect, one or more neural networks are configured based on physics of image formation (202). The one or more neural networks are optimized using acquired test image data (204). An output image may then be reconstructed by applying current image data as input to the one or more optimized neural networks (208).
G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques
G06K 9/66 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques utilisant des comparaisons ou corrélations simultanées de signaux images avec une pluralité de références, p.ex. matrice de résistances avec des références réglables par une méthode adaptative, p.ex. en s'instruisant
G06T 7/32 - Détermination des paramètres de transformation pour l'alignement des images, c. à d. recalage des images utilisant des procédés basés sur la corrélation
G06T 7/33 - Détermination des paramètres de transformation pour l'alignement des images, c. à d. recalage des images utilisant des procédés basés sur les caractéristiques
G06T 7/35 - Détermination des paramètres de transformation pour l'alignement des images, c. à d. recalage des images utilisant des procédés statistiques
40.
DETERMINATION OF MOTION FRAMES BASED ON IMAGE DATA
A system and method include association of imaging event data to one of a plurality of bins based on a time associated with the imaging event data, determination that the time periods of a first bin and the time periods of a second bin are adjacent-in-time, determination of whether a spatial characteristic of the imaging event data of the first bin is within a predetermined threshold of the spatial characteristic of the imaging event data of the second bin, and, based on the determination, reconstruction of one or more images based on the imaging event data of the first bin and the second bin.
A system and method include an array of sensors electrically coupled to a material capable of converting a gamma ray to electrical charge, where distances between a center of a first sensor and centers of each sensor immediately-adjacent to the first sensor are substantially equal. Signals are collected from each sensor immediately-adjacent to the first sensor, and one of a plurality of logical sub-pixels of the first sensor is determined based on the signals collected from each sensor immediately-adjacent to the first sensor.
An improved method for time alignment (TA) procedure and crystal efficiency (CE) normalization estimation procedure for a PET scanner system is disclosed. In the TA procedure modeled time-of-flight (TOF) data are compared against the measured TOF data from an axially short cylinder phantom in order to find individual detector's time offsets (TOs). Then the TOs are estimated simultaneously by matching the TOF center of mass between the modeled and measured TOF data. In the CE estimation, TOF reconstruction of CBM data on the axially short cylinder phantom is performed. Alternating between TOF image reconstruction and CE updates eventually lead to the correct estimation of activity and CE component.
Disclosed herein are novel techniques that address blurriness in medical images resulting from motion of a rigid body, such as a patient, relative to the medical scanning equipment by using a motion-correction algorithm for 3D medical images using to two-dimensional projections.
A computer-implemented method for determining scan parameters includes receiving a set of input parameters. An average single per block for a nuclear imaging scanner having a predetermined field-of-view (FOV) is determined based on the input parameters and at least one scan parameter is determined based on the average single per block for the nuclear imaging scanner.
Provided is a method of fabricating a detector array that includes preparing a plurality of slabs of an optical medium of an imaging device, forming a plurality of optical boundaries within at least one of the slabs of optical medium, where the plurality of optical boundaries defining a 1xN array of non-contiguous, independent light-redirecting regions within the at least one slab, arranging the plurality of slabs into a stack with a reflective layer defined between each adjacent slab and affixing the positions of the plurality of slabs with respect to each other. A detector array formed using the method is also provided.
A system to generate images based on imaging data of a portion of a body and physiological event data associated with a physiological process of the body. The system is to identify a plurality of physiological cycles based on the physiological event data, determine a duration of each of the plurality of physiological cycles, determine a representative duration based on the durations of each of the plurality of physiological cycles, identify a first plurality of the plurality of physiological cycles based on a difference between the durations of the first plurality of physiological cycles and the representative duration, identify a second plurality of the plurality of physiological cycles different from the first plurality of the plurality of physiological cycles, determine a predetermined number of portions of each of the second plurality of the plurality of physiological cycles, accumulate imaging data acquired during respective portions of each of the second plurality of the plurality of physiological cycles to determine a set of accumulated imaging data for each of the predetermined number of portions, and generate a plurality of images, each of the plurality of images being generated based on a respective one of the sets of accumulated imaging data.
A framework for continuously monitored remote power shutdown. In accordance with one aspect, a monitoring circuit (107, 207) is coupled to a power removal circuit (101). The monitoring circuit (107, 207) may generate an output signal indicative of circuit integrity based on one or more electrical characteristics of the power removal circuit (101). A notification system (110) may further be coupled to the monitoring circuit (107, 207). The notification system (110) may generate a notification (112) based on the output signal.
Methods and systems of revising image models for nuclear imaging are disclosed. A system receives first patient scan data corresponding to one or more nuclear imaging scans performed on one or more individuals and generates a first reconstructed image by applying a first image model to the first patient scan data. Feedback is received regarding the first reconstructed image and the feedback is provided as an input to a deep-reinforcement learning process. The deep- reinforcement learning process is configured to generate at least one modification for the first image model based on the feedback regarding the first reconstructed image. A second image model is generated by applying the at least one modification generated by the deep- reinforcement learning process to the first image model.
A framework for image-based probe positioning is disclosed herein. The framework receives a current image from a probe. The current image is acquired by the probe within a structure of interest. The framework predicts a position of the probe and generates a recommendation of a next maneuver to be performed using the probe by applying the current image to a trained classifier. The framework then outputs the predicted position and the recommendation of the next maneuver.
G16H 30/20 - TIC spécialement adaptées au maniement ou au traitement d’images médicales pour le maniement d’images médicales, p.ex. DICOM, HL7 ou PACS
G16H 40/63 - TIC spécialement adaptées à la gestion ou à l’administration de ressources ou d’établissements de santé; TIC spécialement adaptées à la gestion ou au fonctionnement d’équipement ou de dispositifs médicaux pour le fonctionnement d’équipement ou de dispositifs médicaux pour le fonctionnement local
Asymmetry is provided for the pushing pulse in acoustic radiation force impulse (ARFI) imaging. MI is based on the negative pressure. By increasing the positive pressure more than the negative pressure, the magnitude of displacement may be increased without exceeding the MI limit. Similarly, negative voltages depole while positive do not, so using an ARFI or pushing pulse with asymmetric positive-to-negative peak pressures or voltages allows for generation of greater magnitude of displacement without harm to the transducer.
A61B 8/08 - Détection de mouvements ou de changements organiques, p.ex. tumeurs, kystes, gonflements
G01S 7/52 - DÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
G01S 15/89 - Systèmes sonar, spécialement adaptés à des applications spécifiques pour la cartographie ou la représentation
51.
QUANTITATIVE ULTRASOUND USING FUNDAMENTAL AND HARMONIC SIGNALS
A system and method include storage of an echo signal power spectrum of a reference phantom for a fundamental frequency band and an echo signal power spectrum of the reference phantom for a harmonic frequency band, acquisition of an echo signal power spectrum of a region of tissue for the fundamental frequency band and an echo signal power spectrum of the region of tissue for the harmonic frequency band, determination of a first backscatter coefficient based on the echo signal power spectrum of the region of tissue for the fundamental frequency band and the echo signal power spectrum of the reference phantom for the fundamental frequency band, determination of a second backscatter coefficient based on the echo signal power spectrum of the region of tissue for the harmonic frequency band and the echo signal power spectrum of the reference phantom for the harmonic frequency band, and determination of a non-linearity of the region of tissue based on the first backscatter coefficient and the second backscatter coefficient.
G01S 15/89 - Systèmes sonar, spécialement adaptés à des applications spécifiques pour la cartographie ou la représentation
G01S 7/52 - DÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
A61B 8/00 - Diagnostic utilisant des ondes ultrasonores, sonores ou infrasonores
52.
METHOD FOR CONTROLLING GALLIUM CONTENT IN GADOLINIUM-GALLIUM GARNET SCINTILLATORS
Disclosed herein is a method including manufacturing a powder having a composition of formula (1), M1aaM2bbM3ccM4d12 12 (1) where O represents oxygen, M1, M2, M3, and M4represents a first, second, third, and fourth metal that are different from each other, where the sum of a + b + c+ d is about 8, where "a" has a value of about 2 to about 3.5, "b" has a value of 0 to about 5, "c" has a value of 0 to about 5 "d" has a value of 0 to about 1, where "b" and "c", "b" and "d", or "c" and "d" cannot both be equal to zero simultaneously, where M1is a rare earth element comprising gadolinium, yttrium, lutetium, scandium, or a combination of thereof, M2is aluminum or boron, M3is gallium, and M4 is a dopant; and heating the powder to a temperature of 500 to 1700°C in an oxygen containing atmosphere to manufacture a crystalline scintillator.
A system comprises a cantilever structure and a harmonic absorber. The cantilever structure is anchored at an anchor end and connected to a device at a distal end. Use of the device imparts vibrations in the cantilever structure. The harmonic absorber is located at the distal end of the cantilever structure. The harmonic absorber is tuned to a structural frequency of the cantilever structure such that the vibrations in the cantilever structure are damped.
A61B 6/00 - Appareils pour diagnostic par radiations, p.ex. combinés avec un équipement de thérapie par radiations
F16F 13/00 - Ensembles comportant des ressorts du type non à fluide ainsi que des amortisseurs de vibrations, des amortisseurs de chocs ou des ressorts à fluide
F16F 15/03 - Suppression des vibrations dans les systèmes non rotatifs, p.ex. dans des systèmes alternatifs; Suppression des vibrations dans les systèmes rotatifs par l'utilisation d'organes ne se déplaçant pas avec le système rotatif utilisant des moyens électromagnétiques
F16M 13/00 - Autres supports ou appuis pour positionner les appareils ou les objets; Moyens pour maintenir en position les appareils ou objets tenus à la main
54.
DETERMINATION OF METABOLIC RATE FROM STATIC PET SCAN
A system and method include identification of a blood pool region of the body based on the acquired positron emission tomography data,determination of activity in the blood pool region associated with a first time based on the acquired positron emission tomography data, determination of a scale factor based on the determined activity in the blood pool region and on an input function associated with one or more other human bodies, determination of activity in a tissue region associated with a second time based on the acquired positron emission tomography data, determination of a specific uptake ratio associated with the second time based on the activity in the tissue region, the scale factor and a value of the input function at the second time, determination of an estimate of metabolic rate in the tissue region based on the specific uptake ratio and the input function, and determination of a diagnosis associated with the tissue region based on the estimate of metabolic rate.
Methods and systems for automated motion correction of nuclear images are disclosed. A method includes receiving a first set of imaging data including a plurality if annihilation events detected during an imaging period and generating a plurality of four-dimensional volumetric images from the imaging data for the imaging period. Each four-dimensional volumetric image includes a target tissue. At least one motion correction is determined for each of the plurality of four-dimensional volumetric images. The at least one motion correction is determined using target tracking data generated for the target tissue over a time period associated with the four-dimensional volumetric image. Corrected image data is generated from the first set of imaging data and the at least one motion correction and at least one static reconstruction image including the target tissue during the imaging period is generated from the corrected image data.
A method for reconstructing medical images comprises: identifying a plurality of organs in a body of a subject based on an anatomic image; assigning a plurality of voxels in the body to respective ones of the plurality of organs based on the anatomic image; and reconstructing activity images of the body using respectively different processing for the voxels assigned to each respective one of the plurality of organs.
A compact radar system for detecting displacement of an internal organ of a patient in a medical scanner. The system includes at least one transmitting antenna and at least one receiving antenna located in a bed arrangement that supports the patient. In particular, the receiving antenna is located a predetermined distance from a patient reference location to enable detection of electromagnetic energy reflected from a region of the internal organ undergoing asymmetric displacement. The system further includes a radar energizing system that energizes the transmitting and receiving antennas wherein the transmitting antenna irradiates a volume of the patient's body that includes the internal organ. In addition, the receiving antenna detects the reflected electromagnetic energy from the region of the internal organ undergoing asymmetric displacement to enable determination of inhalation and exhalation by the patient.
G01S 13/58 - Systèmes de détermination de la vitesse ou de la trajectoire; Systèmes de détermination du sens d'un mouvement
G01S 13/86 - Combinaisons de systèmes radar avec des systèmes autres que radar, p.ex. sonar, chercheur de direction
G01S 13/88 - Radar ou systèmes analogues, spécialement adaptés pour des applications spécifiques
G01S 7/35 - DÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe - Détails de systèmes non impulsionnels
A61B 5/08 - Dispositifs de mesure pour examiner les organes respiratoires
A61B 5/00 - Mesure servant à établir un diagnostic ; Identification des individus
A61B 6/00 - Appareils pour diagnostic par radiations, p.ex. combinés avec un équipement de thérapie par radiations
A Compton camera for medical imaging is divided into segments (11) with each segment (11) including part of the scatter detector (12), part of the catcher detector (13), and part of the electronics (14). The different segments (11) may be positioned together to form the Compton camera arcing around part of the patient space. By using segments (11), any number of segments (11) may be used to fit with a multi-modality imaging system.
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
G01T 1/24 - Mesure de l'intensité de radiation avec des détecteurs à semi-conducteurs
59.
MULTI-MODAL COMPTON AND SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY MEDICAL IMAGING SYSTEM
A multi-modality imaging system allows for selectable photoelectric effect and/or Compton effect detection. The camera or detector is a module (11) with a catcher detector (13). Depending on the use or design, a scatter detector (12) and/or a coded physical aperture (110) are positioned in front of the catcher detector (13) relative to the patient space. For low energies, emissions passing through the scatter detector (12) continue through the coded aperture (110) to be detected by the catcher detector (13) using the photoelectric effect. Alternatively, the scatter detector (12) is not provided. For higher energies, some emissions scatter at the scatter detector (12), and resulting emissions from the scattering pass by or through the coded aperture (110) to be detected at the catcher detector (13) for detection using the Compton effect. Alternatively, the coded aperture (110) is not provided. The same module (11) may be used to detect using both the photoelectric and Compton effects where both the scatter detector (12) and coded aperture (110) are provided with the catcher detector (13). Multiple modules (11) may be positioned together to form a larger camera, or a module (11) is used alone. By using modules (11), any number of modules (11) may be used to fit with a multi-modality imaging system. One or more such modules (11) may be added to another imaging system (e.g., CT or MR) for a multi-modality imaging system.
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
G21K 1/02 - Dispositions pour manipuler des particules ou des rayonnements ionisants, p.ex. pour focaliser ou pour modérer utilisant des diaphragmes, des collimateurs
G01T 1/24 - Mesure de l'intensité de radiation avec des détecteurs à semi-conducteurs
G01T 1/20 - Mesure de l'intensité de radiation avec des détecteurs à scintillation
G01N 23/20066 - Recherche ou analyse des matériaux par l'utilisation de rayonnement [ondes ou particules], p.ex. rayons X ou neutrons, non couvertes par les groupes , ou en utilisant la réflexion de la radiation par les matériaux en mesurant la diffusion inélastique des rayons gamma, p.ex. effet Compton
To optimize image quality and/or sensitivity, a Compton camera is adaptable. The scatter and/or catcher detectors (12, 13) may move closer to and/or further away from a patient and/or each other. This adaptation allows a balancing of image quality and sensitivity by altering the geometry.
G01T 1/24 - Mesure de l'intensité de radiation avec des détecteurs à semi-conducteurs
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
To capture more emitted photons with a Compton camera, the scatter detector (12) is tilted (non-orthogonal angle) relative to a radial from the isocenter of the imaging system. The tilt creates a greater volume for scatter interaction. To capture more scatter photons, the catcher detector (13) is non-planar, such as a multi-faced detector at least partially surrounding a volume behind the scatter detector (12). The tilted scatter detector (12) alone, the non-planar catcher detector (13) alone, or the tilted scatter detector (12) and the non-planar catcher detector (13) are used in the Compton camera.
G01T 1/24 - Mesure de l'intensité de radiation avec des détecteurs à semi-conducteurs
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
A system and method include execution of a first nuclear imaging scan to acquire first nuclear imaging scan data of a body; generation of a target image based on the first nuclear imaging scan data execute a second nuclear imaging scan to acquire second nuclear imaging scan data of the body association of each of a plurality of portions of the second nuclear imaging scan data with a respective one of a plurality of motion phases of the body, generation, for each of the plurality of motion phases of the body, of a binned image based on the portion of the second nuclear imaging scan data associated with the motion phase, performance of motion-correction on each of the plurality of binned images based on the target image to generate a plurality of motion-corrected binned images, and generation of an image based on the target image and the plurality of motion-corrected binned images.
A system and method includes identification of locations of one or more internal volumes of a body, each of the identified one or more locations associated with radioactivity greater than a threshold level, determination of a degree of interest associated with each of the one or more internal volumes based at least in part on the associated radioactivity, determination of a scanning speed associated with each of a plurality of scanning coordinates, based at least in part on the locations of the one or more internal volumes and the degree of interest associated with each of the one or more of the internal volumes, and control of the nuclear imaging scanner to scan the body based on the plurality of scanning speeds and associated scanning coordinates.
Embodiments can provide a visual indicator system, attachable to a medical imaging patient bed. The visual indicator system comprising: one or more light strips, each light strip comprising a plurality of lights; a distance meter, attachable to one end of the medical imaging patient bed; a storage device, configured to store one or more preconfigured finger gestures; and a microcontroller. The one or more light strips are attachable to the medical imaging patient bed; wherein the microcontroller is configured to illuminate the one or more light strips after the one or more preconfigured finger gestures are made with respect to the one or more light strips. A position of the illumination of the light strip corresponds to a position of performing the one or more preconfigured finger gestures and one or more distance measurements received from the distance meter.
Embodiments provide a computer-implemented method of deriving a periodic motion signal from imaging data for continuous bed motion acquisition, including: acquiring a time series of three dimensional image volumes; estimating a first motion signal through a measurement of distribution of each three dimensional image volume; dividing the time-series of three dimensional image volumes into a plurality of axial sections overlapping each other by a predetermined amount; performing a spectral analysis on each axial section to locate a plurality of three dimensional image volumes which are subject to a periodic motion; performing a phase optimization on each axial section to obtain a three dimensional mask; estimating a second motion signal through the three dimensional mask and the time-series of three dimensional image volumes; and estimating a final motion signal based on the first motion signal and the second motion signal.
A method of manufacturing a collimator (134) on a three-dimensional printer (510) includes obtaining design specifications (536) for the collimator, the design specifications including a channel perimeter pattern and an overall collimator thickness, determining a first quantity of deposit layer permutation types based on the channel perimeter pattern, determining a respective second quantity of permutation layer elements (310, 320, 330) for each respective one of the deposit layer permutations, generating respective sets of sequences for each respective one of the deposit layer permutations, the number of sets equal to the respective second quantity for the corresponding deposit layer permutations, assembling the respective sets of sequences into a three-dimensional print file (538), providing the three-dimensional file to the three-dimensional printer, and manufacturing the collimator by depositing additive layers of material based on contents of the three-dimensional file. A system for implementing the method and a non-transitory computer-readable medium are also disclosed.
G21K 1/02 - Dispositions pour manipuler des particules ou des rayonnements ionisants, p.ex. pour focaliser ou pour modérer utilisant des diaphragmes, des collimateurs
B29C 64/00 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif
67.
CALIBRATION BIAS REDUCTION IN A PRESSURIZED GAS ION CHAMBER-BASED DOSE CALIBRATOR
For dose calibration in functional imaging, different precision sources for a same long-lived isotope are used to calibrate, avoiding having to ship one source from one location to another location. A ratio of sensitivities of a gas ion chamber-based dose calibrator at a reference laboratory to the precision source of the long-lived isotope to a source with an isotope to be used for imaging is found. At the clinical site, a measure of the sensitivity of a local gas ion chamber-based dose calibrator to the other source with the long lived isotope and the ratio from the remote gas ion chamber-based dose calibrator are used to determine sensitivity of the local gas ion chamber based dose calibrator to the isotope of the radiopharmaceutical. The bias and corresponding dose for the radiopharmaceutical to be used for imaging a patient are based on activity for the radiopharmaceutical as calibrated.
A radiation detector comprises a first scintillator having a first peak wavelength and a second scintillator positioned on the first scintillator. The second scintillator has a second peak wavelength different from the first peak wavelength. A plurality of photon detectors are provided. The first scintillator is positioned over and contacts each of the plurality of photon detectors. The plurality of photon detectors include first detectors and second detectors. The second detectors differ from the first detectors in doping profile, pn junction depth, or front-versus-backside illumination geometry. The first detectors are more sensitive to the first peak wavelength than the second peak wavelength. The second detectors are more sensitive to the second peak wavelength than the first detectors.
G01T 1/20 - Mesure de l'intensité de radiation avec des détecteurs à scintillation
G01T 1/29 - Mesure effectuée sur des faisceaux de radiations, p.ex. sur la position ou la section du faisceau; Mesure de la distribution spatiale de radiations
A system and method include training of an artificial neural network to generate a simulated attenuation-corrected reconstructed volume from an input non-attenuation-corrected reconstructed volume, the training based on a plurality of non-attenuation-corrected volumes generated from respective ones of a plurality of sets of two-dimensional emission data and on a plurality of attenuation-corrected reconstructed volumes generated from respective ones of the plurality of sets of two-dimensional emission data.
A61B 5/055 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques; Mesure utilisant des micro-ondes ou des ondes radio faisant intervenir la résonance magnétique nucléaire [RMN] ou électronique [RME], p.ex. formation d'images par résonance magnétique
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques
Embodiments can provide a medical imaging patient bed with an integrated electronic ruler system, comprising a light strip, mounted to the medical imaging bed; a trough comprising an open end and a closed end, mounted to the medical imaging bed and oriented such that the light strip is bounded by the open end and the closed end of the trough; a laser distance meter attached to the open end of the trough; a microcontroller; and a power source configured to provide power to the light strip, laser distance meter, and microcontroller; wherein the microcontroller is configured to illuminate the light strip after one or more distance measurements are received from the laser distance meter when an object is inserted into the trough; wherein a position of the illumination of the light strip corresponds to the one or more distance measurements received from the laser distance meter.
A61B 6/04 - Mise en position des patients; Lits inclinables ou similaires
A61G 7/05 - Lits spécialement conçus pour donner des soins; Dispositifs pour soulever les malades ou les personnes handicapées - Parties constitutives, détails ou accessoires de lits
G01B 11/02 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur
G01B 17/00 - Dispositions pour la mesure caractérisées par l'utilisation de vibrations infrasonores, sonores ou ultrasonores
71.
FLEXIBLE APPLICATION OF CROSS-CALIBRATION FOR QUANTITATIVE FUNCTIONAL IMAGING
During calibration of a SPECT system, system-specific sensitivities and cross- calibration factors for multiple isotopes for correcting for dose are determined for various combinations of options, including the option of which specific well counter with which to measure the dose. The options may include selected energy windows for isotopes with multiple energy windows. This arrangement allows for custom-specified isotopes not included in standard listings. For use with a particular patient, the cross-calibration factor for the well counter used to measure the dosage for the patient is accessed and used for dose correction. More accurate quantitative functional information may result from the corrected dose. The cross-calibration may be more easily implemented despite the options using the sensitivities and cross-calibrations provided for various combinations.
G12B 13/00 - DÉTAILS OU PARTIES CONSTITUTIVES D'INSTRUMENTS OU DÉTAILS OU PARTIES CONSTITUTIVES COMPARABLES D'AUTRES APPAREILS, NON PRÉVUS AILLEURS Étalonnage des instruments ou appareils
A system includes a scintillator to receive radiation and to generate a plurality of light photons in response to reception of the radiation, a light sensor to receive light photons and to generate an electrical signal in response to reception of the light photon, and a processing unit. The processing unit is to receive the electrical signal from the light sensor, determine a first integral over a first number of samples of the electrical signal, determine an estimated energy of a first pulse based on the first integral, where the electrical signal includes the first pulse and a second pulse, where a portion of the second pulse overlaps a portion of the first pulse, determine a second integral over a second number of samples of the electrical signal, determine a second estimated energy of the first pulse over the second number of samples, determine a residual short integral of the second pulse based on the second integral and the second estimated energy, and determine an estimated energy of the second pulse based on the residual short integral of the second pulse.
In one embodiment, a method includes forming a powder having a composition with the formula: AhBiCjO12, where h is 3 ± 10%, i is 2 ± 10%, j is 3 ±10%, A includes one or more rare earth elements, B includes aluminum and/or gallium, and C includes aluminum and/or gallium. The method additionally includes consolidating the powder to form an optically transparent ceramic, and applying at least one thermodynamic process condition during the consolidating to reduce oxygen and/or thermodynamically reversible defects in the ceramic. In another embodiment, a scintillator includes (Gd3-a-cYa)x(Ga5-bAlb)yO12Dc, where a is from about 0.05-2, b is from about 1-3, x is from about 2.8-3.2, y is from about 4.8-5.2, c is from about 0.003-0.3, and D is a dopant, and where the scintillator is an optically transparent ceramic scintillator having physical characteristics of being formed from a ceramic powder consolidated in oxidizing atmospheres.
By way of introduction, the present embodiments described below include apparatuses and methods for generating natural language representations of mental content from functional brain images. Given functional imaging data acquired while a subject reads a text passage, a reconstruction of the text passage is produced. Linguistic semantic vector representations are assigned (1301) to words, phrases or sentences to be used as training stimuli. Basis learning is performed (1305), using brain imaging data acquired (1303) when a subject is exposed to the training stimuli and the corresponding semantic vectors for training stimuli, to learn an image basis directly. Semantic vector decoding (1309) is performed with functional brain imaging data for test stimuli and using the image basis to generate a semantic vector representing the test imaging stimuli. Text generation (1311) is then performed using the decoded semantic vector representing the test imaging stimuli.
A61B 5/04 - Mesure de signaux bioélectriques du corps ou de parties de celui-ci
A61B 5/05 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques; Mesure utilisant des micro-ondes ou des ondes radio
A61B 5/055 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques; Mesure utilisant des micro-ondes ou des ondes radio faisant intervenir la résonance magnétique nucléaire [RMN] ou électronique [RME], p.ex. formation d'images par résonance magnétique
G06K 9/46 - Extraction d'éléments ou de caractéristiques de l'image
G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques
G06F 19/24 - pour l'apprentissage automatique, l'exploration de données ou les bio statistiques, p.ex. détection de motifs, extraction de connaissances, extraction de règles, corrélation, agrégation ou classification
A sealed flexible pouch having an aseptic interior, the sealed flexible pouch including a container for holding a pharmaceutical solution, one or more additional components, and a template frame, wherein the container and the one or more additional components are affixed to a template frame in a predetermined first arrangement and provided inside the sealed flexible pouch.
An anatomical structure is detected (110) in a volume of ultrasound data by identifying (150) the anatomical structure in another volume of ultrasound data and generating (155) an image of the anatomical structure and an anatomical landmark. A group of images are generated (130) of the original volume and compared (140) to the image of the other volume. An image of the group of images is selected (150) as including the anatomical structure based on the comparison.
A method for performing image-guided embryo transfer for in vitro fertilization includes performing a pre-operative magnetic resonance imaging (MRI) scan of a subjects pelvic region to yield a first MRI image dataset. A computer applies a segmentation routine to the first MRI image dataset to yield segment data which is then used by the computer to create an anatomical model of the subjects pelvic region. The computer determines an optimal implant location based on the anatomical model and creates a three-dimensional rendering of the optimal implant location based on the first MRI image dataset.
A61B 17/435 - Instruments ou procédés de gynécologie ou d'obstétrique pour la reproduction ou la fertilisation pour la transplantation d'embryons
A61B 34/20 - Systèmes de navigation chirurgicale; Dispositifs pour le suivi ou le guidage d'instruments chirurgicaux, p.ex. pour la stéréotaxie sans cadre
A61B 90/00 - Instruments, outillage ou accessoires spécialement adaptés à la chirurgie ou au diagnostic non couverts par l'un des groupes , p.ex. pour le traitement de la luxation ou pour la protection de bords de blessures
78.
DATA-DRIVEN SURROGATE RESPIRATORY SIGNAL GENERATION FOR MEDICAL IMAGING
Projection data are acquired by one or more gamma detectors of a medical imaging system. The counts for each projection are binned into time bins to provide respective frames. Using a computer processor, a respective weight factor is computed for each pair of input points among a plurality of input points associated with respective time bins, each input point being an M-dimensional representation of the frame corresponding to the associated time bin for one of the projections. Each weight factor is inversely proportional to a distance computed between the corresponding pair of input points according to an adaptive distance measure that is dependent on the projection data corresponding to said one projection. An N-dimensional surrogate respiratory signal (N
For count loss correction (507), the capability of the discriminator (114), measured periodically, to detect an event is identified (503). Rather than inserting an actual event or a signal emulating an actual event for discrimination, the capability to discriminate is tested by a virtual injection (501). The count loss may be directly measured without causing extra actual discrimination by the discriminator (114). Direct measurement with virtual testing may avoid loss of accuracy due to time and use-case variation.
Transmit power is adaptively set in medical diagnostic ultrasound imaging. The relative strength, such as a ratio, of harmonic and fundamental responses is calculated. This relative strength is used to set the transmit power. The transmit power may be set following ALARA while providing enough information for harmonic imaging.
One or more planes used as part of volume rendering define the depth for measuring. A clip plane is used to crop parts of the volume to be rendered. A multi-planar reconstruction or reformation positions various cut planes to render two-dimensional imaging provided with the volume imaging. One of these planes is used to project a caliper position onto the plane for measurement using the volume rendering. The position of the calipers placed on the volume rendered image of the two-dimensional screen is converted to a location in three- dimensional space based on the plane position.
G06T 19/20 - Transformation de modèles ou d'images tridimensionnels [3D] pour infographie Édition d'images tridimensionnelles [3D], p.ex. modification de formes ou de couleurs, alignement d'objets ou positionnements de parties
G06K 9/52 - Extraction d'éléments ou de caractéristiques de l'image en déduisant des propriétés mathématiques ou géométriques de l'image complète
82.
RECONSTRUCTION WITH MULTIPLE PHOTOPEAKS IN QUANTITATIVE SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
In quantitative SPECT with multiple photopeaks, the combination for the multiple photopeaks is performed within or as part of reconstruction rather than post-reconstruction. Reconstruction is performed iteratively, so the combination for the multiple photopeaks is performed within the iteration loop of the reconstruction, such as combining back projected feedback of the different photopeaks for updating the volume.
Disclosed herein is a method for estimating count loss in a gamma camera comprising injecting a synthetic pulse at a given rate into a data stream emanating from a photo detector; integrating the synthetic pulse into the data stream to form an integrated data stream; determining a number of synthetic pulses from the data stream that pass onto a final image; and determining the count loss from the Equation (2).
Projection data are acquired for a portion of the body of a patient at multiple views using one or more detectors, the projection data including multiple two dimensional (2D) projections. A 3D image is initialized. For each view among the plurality of views, the 3D image is transformed using a view transformation corresponding to said view to generate an initial transformed image corresponding to said view, and multiple iterations of an MLEM process are performed based on at least the initial transformed image and the projection data. The MLEM process is initialized with the initial transformed image. The 3D image is updated based on an output of the MLEM process.
Single photon emission computed tomography (SPECT) is performed with multiple emission energies. For quantitative or qualitative SPECT, the image formation process for emissions at different energy ranges is modeled (44, 46, 48, 50) separately. Different scatter, different attenuation, and/or different collimator-detector response models corresponding to different energy ranges are used in the reconstruction.
Anatomy, such as papillary muscle, is automatically detected (34) and/or detected in real-time. For automatic detection (34) of small anatomy, machine-learnt classification with spatial (32) and temporal (e.g., Markov) (34) constraints is used. For real-time detection, sparse machine-learnt detection (34) interleaved with optical flow tracking (38) is used.
A set of first modality data is provided to an intra-reconstruction motion correction method. The set of first modality data includes a plurality of views. A set of second modality data is provided to the method. A motion estimate is generated for each of the plurality of views in the set of first modality data by registering the set of first modality data with the set of second modality data. A motion corrected model of the set of first modality data is generated by a forward projection including the motion estimate.
A set of set of first modality data is received including at least one view comprising a plurality of gates. The set of first modality data is received from a first imaging modality of an imaging system. A set of second modality data is received from a second imaging modality of the imaging system. A motion corrected model of the set of first modality data is generated by forward projecting the set of first modality data including a motion estimate. An update factor for each of the plurality of views is generated by comparing at least one of the plurality of gates to the motion corrected model. The motion corrected model is updated by the update factor to generate a motion corrected image.
G06F 19/00 - Équipement ou méthodes de traitement de données ou de calcul numérique, spécialement adaptés à des applications spécifiques (spécialement adaptés à des fonctions spécifiques G06F 17/00;systèmes ou méthodes de traitement de données spécialement adaptés à des fins administratives, commerciales, financières, de gestion, de surveillance ou de prévision G06Q;informatique médicale G16H)
89.
CALIBRATING IN SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY WITH MULTI-EMISSION ENERGIES
For calibration (24) for quantitative SPECT, a multiple energy emission source (11) is used for calibration. The planar sensitivities and/or uniformities are determined at different emission energies based on detections from the multiple energy emission source. For estimating (32) the activity concentration, sensitivities and/or uniformities based on measures (26) at different emission energies increase accuracy. The multiple energy emission source (11) may alternatively or additionally be used to calibrate (40) a dose calibrator (15).
Multiple sets of projection data are provided for respective ones of a first set of volumes. An initial image is generated for a second volume larger than each volume in the first set of volumes. Based on at least the initial image and the sets of projection data, an image of the second volume is reconstructed using multiple iterations of a single iterative reconstruction process.
For dead time determination for a gamma camera (18) or other detector, a long-lived point source (26) of emissions is positioned so that the gamma camera (18) detects (34) the emissions from the source (26) while also beinc used to detect (36) emissions from the patient (22). The long-lived point source (26), in the scan time, acts as a fixed frequency source (26) of emissions, allowing for dead time correction measurements that include the crystal detector effects.
A method for performing Photon Counting Computed Tomography (PCCT) using a combination of contrast agents includes configuring a PCCT device with a plurality of threshold values corresponding to a plurality of contrast agents. These contrast agents comprise a long-acting blood pool contrast agent and a nanoparticle contrast agent. The PCCT device is used to perform an imaging scan on an anatomical subject in the presence of the plurality of contrast agents to acquire image data. Next, the imaging data is processed into a plurality of datasets based on the plurality of threshold values. The datasets comprise a first dataset corresponding to the long-acting blood pool contrast agent, and a second dataset corresponding to the nanoparticle contrast agent.
Acoustic radiation force impulse (ARFI) scanning (30) uses a swept focus in transmit. Using a changing delay or phase profile (32) across the array during the generation of the ARFI pulse, a time varying focus is provided for the ARFI beam. This time varying focus may be used to extend the focus in depth, azimuth, and/or elevation. Less repetition may be needed to measure tissue characteristics from displacements due to the multi or continuous change in foci within a given ARFI transmit beam.
A61B 8/08 - Détection de mouvements ou de changements organiques, p.ex. tumeurs, kystes, gonflements
G01S 7/52 - DÉTERMINATION DE LA DIRECTION PAR RADIO; RADIO-NAVIGATION; DÉTERMINATION DE LA DISTANCE OU DE LA VITESSE EN UTILISANT DES ONDES RADIO; LOCALISATION OU DÉTECTION DE LA PRÉSENCE EN UTILISANT LA RÉFLEXION OU LA RERADIATION D'ONDES RADIO; DISPOSITIONS ANALOGUES UTILISANT D'AUTRES ONDES - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
94.
RADIATION DETECTOR FOR IMAGING APPLICATIONS WITH STABILIZED LIGHT OUTPUT
A radiation detector may include a scintillator, a light source, and a sensor. The scintillator may include various scintillation materials capable of converting non-visible radiation (incoming radiation) into visible light. The sensor may be placed in adjacent or in close proximity to the scintillator, such that any converted visible light may be detected or measured by the sensor. The light source may be placed in adjacent or in close proximity to the scintillator, such that light from the light source may interact with defects in the scintillator to minimize interference on the conversion of non-visible radiation into visible light caused by the defects.
A method and system for determining an angulation of a C-arm image acquisition system for a cardiac intervention is disclosed. A 3D ultrasound image including a cardiac region is received. The 3D ultrasound image is registered to a 3D coordinate system of the C-arm image acquisition system. A cardiac structure of interest is detected in the registered 3D ultrasound image. An angulation of the C-arm image acquisition system is determined based on the detected structure of interest in the registered 3D ultrasound image.
A61B 6/00 - Appareils pour diagnostic par radiations, p.ex. combinés avec un équipement de thérapie par radiations
A61B 8/08 - Détection de mouvements ou de changements organiques, p.ex. tumeurs, kystes, gonflements
A61B 8/12 - Diagnostic utilisant des ondes ultrasonores, sonores ou infrasonores dans des cavités ou des conduits du corps, p.ex. en utilisant des cathéters
A method for acquiring medical data comprising the steps of: capturing a frame of SPECT or PET patient image data (14); simultaneously recording measurements (16) of one or more physiological characteristics, synchronously with the capture of the frame of SPECT or PET patient image data; and recording the measurements (16) of one or more physiological characteristics in association with (12) the corresponding patient image data.
A method for examining integrity of cement in a wellbore includes deploying an ultrasound transducer within a wellbore (S21). One or more reference ultrasound images of the cement within the wellbore are acquired (S22). A pushing pulse is emitted from the ultrasound transducer to elicit a displacement of the cement within the wellbore (S23). A sequence of ultrasound images is acquired, over time, depicting the displacement of the cement within the wellbore elicited by the pushing pulse (S24). A strain tensor map is generated from a difference between the one or more reference ultrasound images and the acquired sequence of ultrasound images (S25). A degree of integrity of the cement within the wellbore is determined based on the generated strain tensor map (S27).
E21B 47/14 - Moyens pour la transmission de signaux de mesure ou signaux de commande du puits vers la surface, ou de la surface vers le puits, p.ex. pour la diagraphie pendant le forage utilisant des ondes acoustiques
G01N 29/06 - Visualisation de l'intérieur, p.ex. microscopie acoustique
G01N 29/44 - Traitement du signal de réponse détecté
G01N 3/32 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique en appliquant des efforts répétés ou pulsatoires
G01V 1/40 - Séismologie; Prospection ou détection sismique ou acoustique spécialement adaptées au carottage
98.
APPLICATION OF HIGH INTENSITY FOCUSED ULTRASOUND TO THE DISPLACEMENT OF DRILLING MUD
A method for disrupting an obstruction from a wellbore includes determining a location of an obstruction within a wellbore (S207). An ultrasound transducer is deployed down an interior of a casing in the wellbore (S205). Ultrasound energy is focused, using the ultrasound transducer, to the determined location of the obstruction and the obstruction is disrupted using the focused ultrasound energy (S208).
E21B 37/00 - Procédés ou appareils pour nettoyer les trous de forage ou les puits
E21B 47/09 - Localisation ou détermination de la position d'objets dans les trous de forage ou dans les puits; Identification des parties libres ou bloquées des tubes
E21B 31/00 - Repêchage ou dégagement d'objets dans les trous de forage ou dans les puits
99.
HIGH INTENSITY ULTRASOUND FOR PIPELINE OBSTRUCTION REMEDIATION
High intensity ultrasound is used for pipeline obstruction remediation. Ultrasound transducers are positioned around an outside of the pipeline. The transducers transmit acoustic energy into the obstruction. The acoustic energy heats the obstruction at a location spaced away from the walls of the pipeline. As the obstruction heats, an opening may be formed in the obstruction, relieving pressure build-up without releasing the plug. The obstruction is detected by ultrasonic testing.
B08B 3/12 - Nettoyage impliquant le contact avec un liquide avec traitement supplémentaire du liquide ou de l'objet en cours de nettoyage, p.ex. par la chaleur, par l'électricité ou par des vibrations par des vibrations soniques ou ultrasoniques
E03C 1/30 - Dispositifs pour faciliter l'enlèvement des déchets obstruant les tuyaux de vidange ou les bondes d'évier
G01N 29/06 - Visualisation de l'intérieur, p.ex. microscopie acoustique
G01N 29/26 - Dispositions pour l'orientation ou le balayage
100.
HIGH SPEED CEMENT BOND LOGGING AND INTERACTIVE TARGETED INTERVENTION
A method for cement bond logging and targeted intervention, including lowering (20) a cylindrical nxm array of ultrasound (US) transducers into a well, firing (21) the US transducers to transmit US signals into a well casing, converting (22) reflected US signals received by the transducers into electronic form and transmit the converted signals to a control unit, analyzing (23) the converted signals to detect holidays, if a holiday is detected, determining (24) a position and angle of the holiday with respect to the transducers, and applying (25) a high intensity focused ultrasound (HIFU) signal to the well casing to fill the holiday.
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