Abstract: A medical imaging apparatus based on gamma-ray detection includes a detector and circuitry. The detector includes a plurality of detector modules. Each detector module is divided into N light-sharing segments, and each light-sharing segments covers M photosensors. The circuitry includes (1) a plurality of sets of M first-level electronic units and (2) a second-level electronic unit. Each set of M first-level electronic units reads the electrical signals generated by of a corresponding one of the plurality of detector modules. For each detector module, each first-level electronic unit of a corresponding set of M first-level electronic units reads the electrical signals generated by N photosensors, in a multiplexing manner, to generate timing, energy, and position readout signals on a single set of readout channels. The second-level electronic unit processes the timing, energy, and position readout signals output from M sets of readout channels of the set of M first-level electronic units.

Abstract: A medical imaging system that uses a plurality of time windows in signal integration is provided. The medical imaging system includes a gamma-ray detector, a set of digital readout channels, and a window generator. The gamma-ray detector includes a crystal array and a photosensor array. The photosensor array generates electrical signals in response to receiving incident scintillation light emitted from the crystal array in response to a gamma-ray interaction occurring in the crystal array. The set of digital readout channels acquires the electrical signals and generates a set of digital signals indicating information relating to the gamma-ray interaction. Each channel of the set of digital readout channels includes a charge integrator and an analog-to-digital converter. The window generator generates a plurality of time windows and a single analog-to-digital conversion (ADC) start signal.

Abstract: A device and method in which image scanning circuitry acquires imaging information of an object, and thermal detection circuitry is disposed in close proximity to the image scanning circuitry. The thermal detection circuitry estimates a temperature of the image scanning circuitry by calculating a thermal transfer of heat passing from the image scanning circuitry to the thermal detection circuitry.

Abstract: A PET apparatus is provided. The PET apparatus includes a scintillation array, a photosensor array, and processing circuitry. The scintillation array includes scintillator crystal units that are individually isolated with reflective material. Each scintillator crystal unit is configured to generate scintillation light in response to a gamma-ray interaction in the scintillator crystal unit that is caused by gamma-ray irradiation from an imaging object. Each scintillator crystal unit is configured with a substructure for decoding two or more depths within the scintillator crystal unit, such that gamma-ray interactions at different depths result in scintillation light that escapes from a light-escaping plane of the scintillator crystal unit with different patterns. The photosensor array is coupled to the scintillation array to convert the scintillation light received into electrical signals.

Abstract: A method for performing detector response correction in an X-ray imaging system having a photon-counting detector is disclosed. The method includes obtaining calibration data stored in a calibration data storage, which is generated during a calibration procedure performed with the X-ray imaging system at a first time. The method also includes acquiring air scan data generated through an air scan performed with the X-ray imaging system at a second time after the first time. The method further includes performing, with the X-ray imaging system, an object scan on an imaging object at a third time to generate object scan data. The third time is after the second time. The method further includes performing, using the generated object scan data, detector response correction based on the acquired air scan data and the obtained calibration data, and reconstructing, based on the performed detector response correction, an image of the imaging object.

Abstract: An apparatus and a method for detection of defective pixels for a photon-counting detector-based computed tomography (CT) system is disclosed. In particular, the apparatus and the method disclosed herein, detect detector pixels that have intermittent behavior using on-the-fly defective pixel screening based on various criteria during an object scan. The defective pixels are discarded using a defective pixel map before image reconstruction.

Abstract: An apparatus and method are provided to correct for time-walk errors during photon detections (e.g., detecting gamma rays). A time-walk correction is determined using measurements of energy (or charge) that apply different time windows, enabling corrections accounting for variations in the ratio between fast and slow components in the detected pulse. For example, one time window can be used to integrate the leading end of the pulse, thereby predominantly measuring the fast component, while a second window is used to integrate a trailing end of the pulse to predominantly measure the slow component. Alternatively or additionally, low-pass and high-pass filters may select the slow and fast components, respectively. The time-walk correction is a function of multiple measurements representing different components (e.g., fast and slow) of the pulse shape.

Abstract: A rolling-of-soft-electronics (ROSE) having a planar component with one or more shanks and one or more electrodes disposed on the one or more shanks. The one or more shanks are positioned in rows and separated by a space having a pitch. The planar component is made of a flexible material that is rolled in a ROSE method such that the one or more shanks are circularly arranged in three-dimensions.

Abstract: A PET apparatus includes a detector block including a miniblock including detector crystals, a first detector crystal and a second detector crystal being separated by an inner reflector, the inner reflector having a depth-dependent transparency, a first photosensor configured to detect light from a gamma ray detection event, and a second photosensor configured to detect the light from the gamma ray detection event, a first intensity and a second intensity of the light detected by the first and second photosensor being dependent on the depth-dependent transparency of the inner reflector; and processing circuitry configured to determine, based on the detected first intensity, a first energy, determine, based on the detected second intensity, a second energy, and determine, based on the first energy and the second energy, a depth of interaction (DOI) of the gamma ray detection event.

Abstract: A positron emission tomography (PET) scanner is provided having a plurality of detector subsystems, including processing circuitry to determine, for each detector subsystem of the plurality of detector subsystems, a singles count loss correction factor of the detector subsystem; determine, for each detector subsystem pair of a plurality of pairs of the detector subsystems, a coincidence count loss correction factor for the detector subsystem pair; calculate a scanner coincidence count loss correction factor for the PET scanner based on the coincidence count loss correction factors determined for the plurality of pairs of the detector subsystems; and reconstruct an image based on the calculated scanner count loss correction factor and scan data acquired from a scan of a patient performed using the PET scanner.

Abstract: A PET scanner includes gamma-ray detector rings that form a bore through which an imaging subject is translated, a length of the bore defining an axial length of the PET scanner, the gamma-ray detector rings being movable along the axial length, the gamma-ray detector rings including gamma-ray detector modules therein, and processing circuitry configured to receive PET data associated with a plurality of transaxial slices of the imaging subject, the PET data including a first set of spatial information and timing information corresponding to a first data acquisition period for the gamma-ray detector modules in a first axial position and a second set of spatial information and timing information corresponding to a second data acquisition period for the gamma-ray detector modules in a second axial position, and reconstruct a PET image based on the first set of spatial and timing information and the second set of spatial and timing information.

Abstract: An apparatus for reconstructing a positron emission tomography (PET) image, comprising processing circuitry configured to extract, from raw data obtained from a PET scanner, energy data and timing data associated with a plurality of annihilation events, the extracted energy data and the extracted timing data for each annihilation event corresponding to interactions between each of a pair of gamma rays generated by each annihilation event and one or more gamma ray detectors of the PET scanner, classify each annihilation event based on respective extracted energy data and respective extracted timing data, determine, for each annihilation event and based on a calculated timing resolution of the annihilation event, a width of a time-of-flight kernel, and reconstruct, by processing circuitry, the PET image based on the obtained raw data from the PET scanner and the determined width of the time-of-flight kernel associated with each annihilation event.

Abstract: A method is provided for count loss correction based on detector dead time in a radiation diagnosis apparatus. The method includes acquiring scan data from a scan of a patient performed using the radiation diagnosis apparatus; determining, from the acquired scan data, a first count rate occurring in a first energy window spanning a first energy range; determining, from the acquired scan data, a second count rate occurring in a second window spanning a second energy range, the second energy range being different from the first energy range; calculating a particular count loss correction factor based on the determined first count rate and the determined second count rate; and reconstructing an image based on the acquired scan data and the calculated particular count loss correction factor.

Abstract: A device and method in which image scanning circuitry acquires imaging information of an object, and thermal detection circuitry is disposed in close proximity to the image scanning circuitry. The thermal detection circuitry estimates a temperature of the image scanning circuitry by calculating a thermal transfer of heat passing from the image scanning circuitry to the thermal detection circuitry.

Abstract: An apparatus and a method for detection of defective pixels for a photon-counting detector-based computed tomography (CT) system is disclosed. In particular, the apparatus and the method disclosed herein, detect detector pixels that have intermittent behavior using on-the-fly defective pixel screening based on various criteria during an object scan. The defective pixels are discarded using a defective pixel map before image reconstruction.

Abstract: A method is provided for determining a scatter fraction for a radiation diagnosis apparatus. The method includes acquiring an energy spectrum from list mode data obtained from a scan performed using the radiation diagnosis apparatus; determining, from the acquired list mode data, a first number of events occurring in a first energy window spanning a first energy range; determining, from the acquired list mode data, a second number of events occurring in a second window, the second energy window spanning a second energy range different from the first energy range; calculating a singles scatter fraction based on the determined first number of events and the determined second number of events; and reconstructing an image based on the acquired list mode data and the calculated singles scatter fraction.

Abstract: A method for detecting an anomaly related to a medical imaging device includes acquiring data from a plurality of detectors of the medical imaging device, applying the acquired data to a first autoencoder, and detecting, based on outputs from the first autoencoder, an anomaly related to the medical imaging device.

Abstract: A probe includes a fast-scanning cyclic voltammetry electrode, a conductive wall disposed around the fast-scanning cyclic voltammetry electrode, and a wire in electronic communication with the fast-scanning cyclic voltammetry electrode. The conductive wall is grounded. Fast scanning cyclic voltammetry electrode currents are enclosed within the conductive wall. Resulting fast scanning cyclic voltammetry can have sub-?V level artifacts.

Abstract: Existing, low quality images can be restored using reconstruction or a combination of post-reconstruction techniques to generate a real patient phantom. The real patient phantom (RPP) can then be simulated in Monte Carlo simulations of a higher performance system and a lower performance system. Alternatively, the RPP can be simulated in the higher performance system, and a real scan can be performed by an existing, lower performance system. The higher performance system can be differentiated from the lower performance system in a variety of ways, including a higher resolution time of flight measurement capability, a greater sensitivity, smaller detector crystals, or less scattering. A neural network can be trained using the images produce by the higher performance system as the target, and the images produced by the lower performance system as the input.

Abstract: A system and method of providing nutritional data for a user is disclosed herein. The method includes receiving a selected restaurant from a health tracking device, and providing menu data for the user based on the selected restaurant. The method further includes receiving a selected menu item from the health tracking device, associating the selected menu item with a plurality of food items in a database, and providing the plurality of food items for the user. Furthermore, the method includes receiving a selected one of the plurality of food items from the health tracking device, and providing nutritional data based on the selected one of the plurality of food items.