A positron emission tomography apparatus according to an embodiment includes a plurality of positron emission tomography (PET) detector entities and processing circuitry. The plurality of PET detector entities are arranged in a ring formation. The processing circuitry is configured: to obtain, with respect to each of the plurality of PET detector entities, state information indicating a state of the PET detector entity; to detect an abnormality when an index value indicating a state of any individual or a whole of the plurality of PET detector entities exceeds a threshold value on the basis of the state information; and to detect a state in which the abnormality is not detected on the basis of the state information, but an index value indicating states of at least two of the plurality of PET detector entities is different from an index value indicating states of at least two other PET detector entities.

A radiation position detector includes: a photodetector array constituted of unit-sized unit photodetectors; a scintillator array constituted of a plurality of tetragonal scintillator elements optically connected to the photodetector array, wherein scintillator units are each constituted of a pair of unit scintillators whose individual cross-sectional size of plane facing to right receiving surface is ¼ of the size of the unit photodetector, where at least part of which is optically connected on a surface side opposite to the right receiving surface, the scintillator units being each arranged so as to be positioned over two of the unit photodetectors; and a position evaluation unit configured to identify the scintillator unit by the presence or absence of a signal and furthermore identify one of the unit scintillators of the scintillator unit on the basis of a strength of the signal, to obtain a two-dimensional radiation detection position.

A PET detector and method thereof are provided. The PET detector may include: a crystal array including a plurality of crystal elements arranged in an array and light-splitting structures set on surfaces of the plurality of crystal elements, the light-splitting structures jointly define a light output surface of the crystal array; a semiconductor sensor array, which is set in opposite to the light output surface of the crystal array and is suitable to receive photons from the light output surface, the semiconductor sensor array comprises a plurality of semiconductor sensors arranged in an array.

A method, a system, a device, and a computer program produce for photon detection is disclosed. The method includes receiving, by a plurality of anodes, a photon via one or more of the plurality of anodes; measuring respective voltages of the photon at each of the plurality of anodes; counting incidents in which the photon is detected by more than one of the plurality of anodes based on the measuring; and outputting information regarding a counted number of incidents in which the photon is detected by more than one of the plurality of anodes, wherein the information regarding the courted number of incidents in which the photon is detected by more than one of the plurality of anodes is used as part of a production of an image associated with the received photon.

One or more example embodiments of the present invention relates to a system for detection of x-ray radiation. The system comprises photon-counting x-ray CT scanners and associated edge devices. Each edge device determines a quality indicator indicative of a quality of the sensor data based on scanner data. Further, each edge device generates a parameterized machine learning model by optimizing the quality indicator. A server device receives the generated parameterized machine learning models from the edge devices, aggregates the parameterized machine learning models into an aggregated parameterized machine learning model, and sends at least part of the aggregated parameterized machine learning model back to the edge devices.

The embodiments of the present disclosure provide a state detection method and system for an imaging device. The method includes: obtaining a first background event of a crystal of a detector of the imaging device, the first background event being related to an inherent radiating particle of the crystal; correcting a crystal position look-up table based on the first background event; correcting an energy state of the imaging device; obtaining the second background event of the crystal, the second background event being related to the inherent radiating particle of the crystal; and correcting a state of time of flight of the detector based on the first background event and the second background event.

A method and system for providing improved timing calibration information for use with apparatuses performing Time of Flight Positron Emission Tomography scans. Relative timing offset, including timing walk, within a set of processing units in the scanner are obtained and corrected using a stationary limited extent positron-emitting source, and timing offset between the set of processing units is calibrated using an internal radiation source, for performing calibration.

Wearable apparatus and method of using same for tracking a labeled probe in a subject are disclosed.

The present disclosure is related to systems and methods for reconstructing a positron emission tomography (PET) image. The method includes obtaining PET data of a subject. The PET data may correspond to a plurality of voxels in a reconstructed image domain. The method includes obtaining a motion signal of the subject. The method includes obtaining motion amplitude data. The motion amplitude data may indicate a motion range for each voxel of the plurality of voxels. The method includes determining gating data based at least in part on the motion amplitude data. The gating data may include useful percentage counts each of which corresponds to at least one voxel of the plurality of voxels. The method includes gating the PET data based on the gating data and the motion signal. The method includes reconstructing a PET image of the subject based on the gated PET data.

A planar-symmetry device for high-sensitivity gamma ray detection, which allows real-time tomography image reconstruction with very good spatial resolution. Advantageously, the multi-pinhole collimators of the device move during data collection and/or one or more of the pinholes thereof moves independently, thereby allowing possible artifacts resulting from overlap areas of the detector to be completely eliminated.