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公开(公告)号：EP4411648A1
公开(公告)日：2024-08-07
申请号：EP24150798.7
申请日：2024-01-08
发明人： QI, Wenyuan , YANG, Li , KOLTHAMMER, Jeffrey , ASMA, Evren , QI, Jinyi , LI, Tiantian
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T2211/41220130101
摘要： A PET apparatus (1100) of an embodiment includes a processing unit (1170) configured to: obtain list mode data representing radiation detected during an imaging scan; generate divided data from the list mode data for each time interval of a first length, the divided data having a time width of a second length longer than the first length; determine a respiratory waveform based on the divided data, and; reconstruct an image based on the respiratory waveform and the list mode data.
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公开(公告)号：EP4398190A1
公开(公告)日：2024-07-10
申请号：EP24150980.1
申请日：2024-01-09
发明人： QI, Wenyuan , YANG, Li , KOLTHAMMER, Jeffrey , TSAI, Yu-Jung , ASMA, Evren , IATROU, Maria , QI, Jinyi , LI, Tiantian
IPC分类号： G06T11/00
CPC分类号： G06T11/005
摘要： A medical information processing method includes receiving list-mode data acquired by scanning an imaging object using a positron emission tomography (PET) system (1100), producing a plurality of vectors based on the received list-mode data, generating a reference vector based on the produced plurality of vectors, selecting, from the produced plurality of vectors, a set of vectors corresponding to a single gate, based on respective differences compared with the generated reference vector, and generating an image of the imaging object based on the selected set of vectors.
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公开(公告)号：EP4075168A1
公开(公告)日：2022-10-19
申请号：EP22168511.8
申请日：2022-04-14
发明人： QI, Wenyuan , QIANG, Yi , PENG, Peng , ASMA, Evren , KOLTHAMMER, Jeffrey
摘要： A nuclear medicine diagnosis device according to an embodiment includes an acquisition unit 770a, a determination unit 770b, and a generation unit 770c. The acquisition unit 770a acquires gamma ray detection data of an object. The determination unit 770b determines the weight of each of multiple coincidences based on three or more of events detected within a first time window, in the gamma ray detection data. The generation unit 770c generates first nuclear medicine image data based on the weight.
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公开(公告)号：EP3915479A1
公开(公告)日：2021-12-01
申请号：EP21176076.4
申请日：2021-05-26
发明人： QI, Wenyuan , QIANG, Yi , ASMA, Evren , KOLTHAMMER, Jeffrey
摘要： A positron emission tomography (PET) apparatus according to an embodiment includes a plurality of PET detector rings (101, 601, 701, 901, 1001, 1101) and a processing unit (307). The plurality of PET detector rings (101, 601, 701, 901, 1001, 1101) is configured to form a bore in which a subject is placed, and to be adjustable in position in an axial direction, the bore defining a field of view (FOV) of the apparatus. The processing unit 307) is configured to obtain information regarding a PET scan mode, and to adjust, based on the information regarding the PET scan mode, position of each of the plurality of PET detector rings (101, 601, 701, 901, 1001, 1101) from a first position to a second position in the axial direction.
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公开(公告)号：EP4350396A1
公开(公告)日：2024-04-10
申请号：EP23201886.1
申请日：2023-10-05
发明人： LI, Xiaoli , QIANG, Yi , KOLTHAMMER, Jeffrey , MIYAHARA, Masaki
摘要： A positron emission tomography (PET) apparatus(500) 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 apparatus 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 apparatus.
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公开(公告)号：EP4318400A1
公开(公告)日：2024-02-07
申请号：EP23189007.0
申请日：2023-08-01
发明人： CHAN, Chung , YANG, Li , LI, Xiaoli , QI, Wenyuan , ASMA, Evren , KOLTHAMMER, Jeffrey
IPC分类号： G06T11/00
摘要： An image processing apparatus according to an embodiment includes processing circuitry (9070). The processing circuitry (9070) is configured to acquire list-mode data corresponding to a plurality of detection times, generate a plurality of frames based on the list-mode data, assign at least one frame of the plurality of frames into a first frame group based on a similarity of each frame, assign at least one frame of the plurality of frames into a second frame group based on a similarity of each frame, estimate first and second frame group-specific reconstruction parameters based on frames in first frame group, and frames in the second frame group, respectively, wherein the first and second frame group-specific reconstruction parameters are different, reconstruct a first set of frame data from any frame of the first frame group based on the first frame group-specific reconstruction parameter, and reconstruct a second set of frame data from any frame of the second frame group based on the second frame group-specific reconstruction parameter.
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公开(公告)号：EP3845929A1
公开(公告)日：2021-07-07
申请号：EP20217827.3
申请日：2020-12-30
发明人： QI, Wenyuan , QIANG, Yi , ASMA, Evren , LI, Xiaoli , YANG, Li , PENG, Peng , KOLTHAMMER, Jeffrey
摘要： A positron emission tomography "PET" apparatus (1100) according to an embodiment includes a PET detector (100), an acquisition unit (1170) and a calculation unit (1170). The PET detector (100) comprises a plurality of arrayed rings in each of which a plurality of detector crystals (105) are arrayed. The acquisition unit (1170) acquires a first crystal efficiency for each detector crystal (105) based on a measured gamma ray emitted from a line source, a second crystal efficiency for each detector crystal, which is calculated based on a gamma ray from a cylinder source, and a third crystal efficiency for each detector crystal, which is calculated based on a gamma ray from the line source. The calculation unit (1170) calculates a fourth crystal efficiency for each detector crystal based on the first crystal efficiency, the second crystal efficiency, and the third crystal efficiency.
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公开(公告)号：EP4397246A1
公开(公告)日：2024-07-10
申请号：EP24150922.3
申请日：2024-01-09
发明人： QIANG, Yi , ZHAN, Xiaohui , QI, Wenyuan , KOLTHAMMER, Jeffrey
CPC分类号： A61B6/037 , A61B6/032 , A61B6/5205 , A61B6/482 , G01T1/1648 , G01T1/2985
摘要： An attenuation map generation method according to an embodiment comprises receiving computed tomography (CT) image data of a subject; and generating an attenuation map for Positron Emission Tomography (PET) image reconstruction by inputting the received CT image data into a trained deep convolutional neural network (DCNN) model that outputs the attenuation map, wherein the DCNN model was trained using training input image data and corresponding training attenuation map data generated from spectral CT image data.
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