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9 条记录 (耗时 0.016 秒)

    Radiation detector
    1.
    发明授权
    Radiation detector 有权

    公开(公告)号：US11686865B2

    公开(公告)日：2023-06-27

    申请号：US17454107

    申请日：2021-11-09

    申请人： CANON MEDICAL SYSTEMS CORPORATION

    发明人： Go Kawata ,  Tatsuo Osaka

    IPC分类号： G01T1/20 ,  A61B6/00 ,  A61B6/03

    CPC分类号： G01T1/2018 ,  A61B6/032 ,  A61B6/4241

    摘要： A radiation detector according to an embodiment includes a scintillator array, a sensor array, electronic circuitry, a switch, and control circuitry. The scintillator array includes a plurality of scintillator pixels each configured to convert radiation into light. The sensor array includes a plurality of detection elements each configured to detect the light. The electronic circuitry is configured to output digital data on the basis of signals output from the detection elements. The switch is provided between the sensor array and the electronic circuitry. The control circuitry is configured to control the switch on the basis of a positional relation between the sensor array and the scintillator array.

    Radiation detector and radiation diagnosis apparatus
    5.
    发明授权
    Radiation detector and radiation diagnosis apparatus 有权

    公开(公告)号：US11543543B2

    公开(公告)日：2023-01-03

    申请号：US17355777

    申请日：2021-06-23

    申请人： CANON MEDICAL SYSTEMS CORPORATION

    发明人： Go Kawata ,  Hiroaki Nakai

    IPC分类号： G01T1/24 ,  G01T1/17

    摘要： A radiation detector according to an embodiment includes: a cathode electrode, a plurality of anode electrodes, a crystal, an anti-scatter grid, and a conductive part. The cathode electrode is provided on the radiation incident side. The plurality of anode electrodes are arranged so as to oppose the cathode electrode. The crystal is provided between the cathode electrode and the plurality of anode electrodes and configured to convert incident radiation into electrons. The conductive part is provided between the plurality of anode electrodes and has a conductivity higher than that of the crystal. The anti-scatter grid is provided on the radiation incident side of the cathode electrode so as to oppose the conductive part via the crystal, while being arranged in a first direction.

    Radiation measuring apparatus, computer program product, and radiation computed tomography apparatus
    6.
    发明授权
    Radiation measuring apparatus, computer program product, and radiation computed tomography apparatus 有权

    公开(公告)号：US10281592B2

    公开(公告)日：2019-05-07

    申请号：US15257182

    申请日：2016-09-06

    申请人： Canon Medical Systems Corporation

    发明人： Go Kawata ,  Shunsuke Kimura ,  Hideyuki Funaki ,  Masanori Furuta ,  Tetsuro Itakura

    IPC分类号： A61B6/00 ,  A61B6/03 ,  G01T1/17

    摘要： According to an embodiment, a radiation measuring apparatus includes a detector, comparators, a threshold controller, counters, and a generator. The detector includes plural detecting elements each configured to convert energy of incident radiation into a first electrical signal. The comparators correspond to the respective detecting elements, each comparator being configured to output a second electrical signal when a level of the corresponding first electrical signal is not less than a threshold. The threshold controller is configured to supply a first value as the threshold to the respective comparators at a first time, and supply a second value as the threshold to the respective comparators at a second time. The counters correspond to the respective comparators, each counter being configured to count the corresponding second electrical signal. The generator is configured to generate a pulse height frequency distribution of the radiation by using counts of the counters.

    X-ray imaging apparatus and monochromatic x-ray generating method
    8.
    发明授权
    X-ray imaging apparatus and monochromatic x-ray generating method 有权

    公开(公告)号：US11229412B2

    公开(公告)日：2022-01-25

    申请号：US17073584

    申请日：2020-10-19

    申请人： CANON MEDICAL SYSTEMS CORPORATION

    发明人： Go Kawata

    IPC分类号： A61B6/00 ,  G01T1/20 ,  A61B6/04 ,  A61B6/03 ,  H05G1/02

    摘要： An X-ray imaging apparatus according to an embodiment of the present disclosure includes an X-ray tube, a photon counting X-ray detector, and a filter unit. A generating unit of the X-ray tube is configured to generate X-rays. The photon counting X-ray detector is configured to count photons contained in the X-rays. The filter unit is provided between the X-ray tube and the photon counting X-ray detector. The filter unit includes a first filter and a second filter. The first filter is configured to shape a spectrum of the X-rays. The second filter is configured to generate X-ray fluorescence on the basis of X-rays related to a spectrum resulting from the shaping by the first filter.

    Radiation detector and X-ray CT apparatus
    9.
    发明授权
    Radiation detector and X-ray CT apparatus 有权

    公开(公告)号：US11207037B2

    公开(公告)日：2021-12-28

    申请号：US16878663

    申请日：2020-05-20

    申请人： CANON MEDICAL SYSTEMS CORPORATION

    发明人： Go Kawata ,  Hiroaki Nakai

    IPC分类号： A61B6/03 ,  A61B6/00

    摘要： A radiation detector according to an embodiment includes a sensor, an electronic circuitry, a switch, and a control circuitry. The sensor configured to be formed of plural electrodes and detect radiation. Based on signals output from the electrodes, the electronic circuitry configured to output digital data. The switch configured to be provided between each of the electrodes and the electronic circuitry. The control circuitry configured to control the switch, based on a positional relation between the plural electrodes and an anti-scatter grid.