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

申请人： Canon Medical Systems Corporation

发明人： QIANG, Yi ,  ZHAN, Xiaohui ,  QI, Wenyuan ,  KOLTHAMMER, Jeffrey

IPC分类号： A61B6/03 ,  A61B6/00

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.

公开(公告)号：EP4462160A1

公开(公告)日：2024-11-13

申请号：EP24175199.9

申请日：2024-05-10

申请人： Canon Medical Systems Corporation

发明人： ZHAN, Xiaohui ,  ZHANG, Ruoqiao ,  CLARKE, Cameron ,  QIANG, Yi

IPC分类号： G01T1/29

摘要： A photon counting computed tomography scanner according to an embodiment includes a reception unit (9920a), a specific unit (9920b) and an update unit (9920c). The reception unit (9920a) receives a bad pixel map generated by a calibration scan. The specific unit (9920b) specifies a bad pixel based on patient scan. The update unit (9920c) updates the bad pixel map based on the bad pixel.

公开(公告)号：EP4307015A1

公开(公告)日：2024-01-17

申请号：EP23185121.3

申请日：2023-07-12

申请人： Canon Medical Systems Corporation

发明人： ZHAN, Xiaohui ,  HEIN, Ilmar ,  ZHANG, Ruoqiao

IPC分类号： G01T1/17

摘要： A photon counting detector (PCD) apparatus according to an embodiment includes a PCD array including a plurality of pixels positioned in at least one of a channel direction and a row direction, and processing circuitry configured to receive signals from each of the plurality of pixels, configure the PCD array to include (a) a first pixel area including a first group of pixels of the plurality of pixels and (b) a second pixel area including a second group of pixels of the plurality of pixels, such that a portion of the pixels overlap between the first and second groups, bin the signals from the first group of pixels into a first virtual bin value, and bin the signals from the second group of pixels into a second virtual bin value.

公开(公告)号：EP3933445A1

公开(公告)日：2022-01-05

申请号：EP21183401.5

申请日：2021-07-02

申请人： Canon Medical Systems Corporation

发明人： LAI, Xiaochun ,  CAI, Liang ,  QIANG, Yi ,  ZHAN, Xiaohui

IPC分类号： G01T1/17

摘要： An X-ray CT apparatus (1) according to an embodiment includes an x-ray source (12a), scan control circuity (33), a detector (13), photon counting circuits (42-n), connection circuitry (44) and processing circuitry (43). The scan control circuity (33) controls the x-ray source (12a) to expose a subject with x-rays over a scan having a plurality of views. The detector (13) is disposed to receive x-rays from the x-ray source (12a) and has plurality of pixels arranged in groups. The photon counting circuits (42-n) is provided for each of the pixels respectively. The connection circuitry (44) selectively connects, in a first mode, each pixel to one of the photon counting circuits (42-n) respectively and, in a second mode, each pixel in a group to a same one of the photon counting circuits (42-n). The processing circuitry (43), is connected to the connection circuitry (44) and the photon counting circuits (42-n), selects, for each of the views, the first mode or the second mode based upon a count rate of the x-rays.