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公开(公告)号：US11644584B2
公开(公告)日：2023-05-09
申请号：US17415578
申请日：2019-11-28
申请人： Tsinghua University
发明人： Tianyu Ma , Yaqiang Liu , Xuewu Wang , Zhong Wang
CPC分类号： G01T1/2907 , G21K1/02 , G01T1/2985
摘要： The present disclosure provides a gamma ray imaging device and an imaging method, where the imaging device includes a plurality of separate detectors. The plurality of separate detectors are provided at an appropriate spatial position, in an appropriate arrangement manner and are of an appropriate detector material, such that when rays emitted from different positions in an imaging area reach at least one of the plurality of separate detectors, at least one of the thicknesses of the detectors, the materials of the detectors, and the numbers of the detectors though which the rays pass are different, thereby achieving the effect of determining the directions of rays.
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公开(公告)号：US20230296795A1
公开(公告)日：2023-09-21
申请号：US18041439
申请日：2021-08-12
申请人： Tsinghua University
发明人： Tianyu Ma , Yaqiang Liu , Xuewu Wang , Zhong Wang
CPC分类号： G01T1/1642 , G21K1/025 , G01T1/2992
摘要： Disclosed are a detection collimation unit, a detection apparatus and a SPECT imaging system. The detection collimation unit includes: a scintillation crystal array configured to receive a gamma photon emitted by a radioactive source in a detected object; and a number of photoelectric devices configured to receive the gamma photon and converting the gamma photon into a digital signal. The scintillation crystal array includes a number of scintillation crystals. The number of scintillation crystals are arranged substantially in parallel and are spaced from each other. Each scintillation crystal has a side face configured to receive a ray emitted by the radioactive source and an end face. The number of photoelectric devices are coupled to the end faces of the number of scintillation crystals.
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公开(公告)号：US11191510B2
公开(公告)日：2021-12-07
申请号：US16068699
申请日：2017-05-22
申请人： Tsinghua University
发明人： Yaqiang Liu , Tianyu Ma , Peng Fan
摘要： Provided are an imaging system and method based on multiple-gamma photon coincidence events. The imaging system includes: a plurality of detector assemblies arranged in a non-parallel manner, a time coincidence module and a computer platform. Each detector assembly includes a collimator and a detector configured to measure time and to detect a multiple-gamma photon coincidence event constituted by a plurality of single-gamma photon events cascade-emitted by a radionuclide within a short time. The method is configured to determine validity of the multiple-gamma photon coincidence event, calculate a plurality of non-parallel projection lines where the decay of the radionuclide takes place, determine a location where the decay of the radionuclide takes place according to the non-parallel projection lines, and obtain a distribution of the radionuclide in the subject according to the location where the decay of the radionuclide takes places.
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