公开(公告)号：US12140716B2

公开(公告)日：2024-11-12

申请号：US17090791

申请日：2020-11-05

Applicant: CANON KABUSHIKI KAISHA

Inventor： Masato Ofuji ,  Jun Kawanabe ,  Kentaro Fujiyoshi ,  Minoru Watanabe ,  Kai Suzuki ,  Hideyuki Okada

IPC: G01T1/24 ,  H04N5/32 ,  H04N25/75

Abstract: An apparatus comprises a plurality of pixels each including a conversion element and a switch, a driving circuit configured to control the switches via drive lines, a bias power supply unit configured to supply a bias potential to the conversion element via a bias line, column signal lines to which signals are output from the plurality of pixels, and a detection unit. The plurality of pixels include a first pixel and a second pixel, which are adjacent to each other in the row direction and are connected to a common column signal line. The switch of the first pixel and the switch of the second pixel are connected to drive lines different from each other. The detection unit determines presence/absence of radiation irradiation based on a current flowing to the bias line.

公开(公告)号：US11693131B2

公开(公告)日：2023-07-04

申请号：US17525441

申请日：2021-11-12

Applicant: CANON KABUSHIKI KAISHA

Inventor： Jun Kawanabe ,  Kentaro Fujiyoshi

IPC: G01T1/20 ,  G01T1/208 ,  H01L27/146 ,  H04N25/40

CPC classification number: G01T1/20181 ,  G01T1/208 ,  H01L27/14659 ,  H04N25/40

Abstract: A radiation imaging apparatus comprising a first scintillator, a second scintillator which receives radiation transmitted through the first scintillator, conversion elements and a controller is provided. The conversion elements include first conversion elements and second conversion elements with different sensitivities for detecting light emitted from at least one of the first scintillator or the second scintillator. During radiation irradiation, the controller obtains, from a signal output from one or more measuring element configured to measure a dose of incident radiation, a first signal corresponding to light converted from radiation by the second scintillator, and outputs, based on the first signal, a stop signal configured to stop the radiation irradiation, and after the radiation irradiation, the controller causes the first conversion elements and the second conversion elements to output signals configured to generate an energy subtraction image.

公开(公告)号：US11630220B2

公开(公告)日：2023-04-18

申请号：US17808170

申请日：2022-06-22

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takuya Ryu ,  Kentaro Fujiyoshi ,  Ryosuke Miura

IPC: H04N25/68 ,  G01T1/20

Abstract: A radiation imaging apparatus includes pixels arranged to form pixel rows and pixel columns. The pixels include first pixels and second pixels whose sensitivity to radiation is lower than the first pixels. The apparatus further includes a signal lines arranged to correspond to the pixel columns, a readout circuit configured to read out a signal from the pixels via the signal lines, and a processing unit configured to decide a correction value using signals read out from the second pixels and correct signals read out from the first pixels using the correction value. An internal structure of the readout circuit has a period. The second pixels are arranged such that there are two or more types of remainders of column numbers of pixel columns that include the second pixels divided by the period.

公开(公告)号：US11280919B2

公开(公告)日：2022-03-22

申请号：US16720989

申请日：2019-12-19

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuro Takenaka ,  Shoshiro Saruta ,  Atsushi Iwashita ,  Kentaro Fujiyoshi ,  Keiichi Nomura ,  Kazumi Nagano ,  Yohei Ishida ,  Tomoki Komatsu

IPC: G01T1/20

Abstract: A radiation imaging apparatus is provided. The apparatus includes a substrate in which conversion elements are arranged and which transmits light beams, a first scintillator arranged on a first surface side of the substrate, and a second scintillator arranged on a second surface side opposite to the first surface. The conversion elements include first conversion elements and second conversion elements. The first conversion elements are arranged so as to receive light beams from the first scintillator and the second scintillator. A light-shielding layer is arranged between the first scintillator and each of the second conversion elements so as to set light amounts of the second conversion elements from the first scintillator smaller than those of the first conversion elements from the first scintillator, and the second conversion elements are arranged to receive a light beam from the second scintillator.

公开(公告)号：US11157059B2

公开(公告)日：2021-10-26

申请号：US16443208

申请日：2019-06-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Keigo Yokoyama ,  Minoru Watanabe ,  Kentaro Fujiyoshi

IPC: G01T1/175 ,  G06F1/3206

Abstract: A radiation imaging apparatus comprising an imaging unit configured to generate a radiation image, a detector configured to detect radiation to monitor an incident dose, a processor including an amplifier and configured to perform processing of reading out signals from the imaging unit and the detector and outputting a signal based on the readout signals, and a controller configured to control the processor is provided. The controller causes the processor to operate in a first power consumption mode before radiation irradiation and perform a reset operation, and causes the processor to operate in a second power consumption mode with higher power consumption than the first power consumption mode in accordance with information indicating a start of radiation irradiation, and causes the processor to start outputting a signal for monitoring an incident dose based on a signal read out from the detector.

公开(公告)号：US20210243389A1

公开(公告)日：2021-08-05

申请号：US17234254

申请日：2021-04-19

Applicant: CANON KABUSHIKI KAISHA

Inventor： Satoru Sawada ,  Kentaro Fujiyoshi

IPC: H04N5/32 ,  G01T1/29

Abstract: A radiation image capturing apparatus includes, as a plurality of pixels two-dimensionally arranged in an image capturing area, a plurality of image pixels configured to output electric signals for acquiring a radiation image and a plurality of detection pixels configured to output electric signals for detecting information about irradiation of the image capturing area with the irradiation. The plurality of detection pixels is arranged as a line-shaped detection pixel group in the image capturing area, and a plurality of detection driving lines is connected to the line-shaped detection pixel group. A readout circuit reads out, at different timings, the electric signals group by group to each of which a different one of the plurality of detection driving lines is connected in the line-shaped detection pixel group.

公开(公告)号：US20200371259A1

公开(公告)日：2020-11-26

申请号：US16989118

申请日：2020-08-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Ryosuke Miura ,  Minoru Watanabe ,  Kentaro Fujiyoshi

IPC: G01T1/20

Abstract: A radiation imaging apparatus comprises at least one first detection element including a first conversion element configured to convert radiation into an electrical signal and a first switch configured to connect an output from the first conversion element to a first signal line, at least one second detection element including a second conversion element configured to convert radiation into an electrical signal and a second switch configured to connect an output from the second conversion element to a second signal line, a readout unit configured to read out signals appearing on the first signal line and the second signal line, and a signal processing circuit configured to process a signal read out from the readout unit. A sensitivity of the first conversion element for the radiation is set to be different from a sensitivity of the second conversion element for the radiation.

公开(公告)号：US09661240B2

公开(公告)日：2017-05-23

申请号：US14696936

申请日：2015-04-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kentaro Fujiyoshi ,  Minoru Watanabe ,  Keigo Yokoyama ,  Masato Ofuji ,  Jun Kawanabe ,  Hiroshi Wayama

IPC: H05G1/64 ,  H04N5/32 ,  G01T1/24 ,  G01N23/04 ,  G01T1/20

CPC classification number: H04N5/32 ,  G01N23/04 ,  G01T1/2018 ,  G01T1/247

Abstract: A pixel includes a conversion element detecting radiation, and a switch between the element and a signal line. A readout unit reads out a signal on the signal line. The readout unit includes a reset unit that resets a potential of the signal line. A period during which the readout unit reads out a signal on the signal line includes a first period during which the signal line is reset, and a signal on the signal line in a state that the switch is not turned on is read out, and a second period during which the signal line is reset, and a signal on the signal line due to the switch being turned on is read out. The processing unit calculates a difference between the signals read out in the second and first periods.

公开(公告)号：US09450002B2

公开(公告)日：2016-09-20

申请号：US14048200

申请日：2013-10-08

Applicant: CANON KABUSHIKI KAISHA

Inventor： Minoru Watanabe ,  Chiori Mochizuki ,  Keigo Yokoyama ,  Masato Ofuji ,  Jun Kawanabe ,  Kentaro Fujiyoshi ,  Hiroshi Wayama

IPC: H01L27/146

CPC classification number: H01L27/14612 ,  H01L27/14663

Abstract: A detecting apparatus formed on a substrate, includes a plurality of pixels arranged in a matrix, and a signal line electrically connected to the pixels. Each of the pixels includes a sensing element that converts radiant ray or light to electric charges, an amplification thin film transistor that outputs an electric signal based on an amount of the electric charges, a capacitor that holds an electric signal output by the amplification thin film transistor, and a transfer thin film transistor that transfers an electric signal held in the capacitor to the signal line.

Abstract translation: 形成在基板上的检测装置包括以矩阵形式布置的多个像素，以及与像素电连接的信号线。 每个像素包括将辐射线或光转换成电荷的感测元件，基于电荷量输出电信号的放大薄膜晶体管，保持由放大薄膜输出的电信号的电容器 晶体管和将保持在电容器中的电信号传送到信号线的转移薄膜晶体管。

公开(公告)号：US20160211286A1

公开(公告)日：2016-07-21

申请号：US15080342

申请日：2016-03-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kentaro Fujiyoshi ,  Minoru Watanabe ,  Keigo Yokoyama ,  Masato Ofuji ,  Jun Kawanabe ,  Hiroshi Wayama

IPC: H01L27/146 ,  A61B6/00

CPC classification number: H01L27/1462 ,  A61B6/461 ,  A61B6/563 ,  H01L27/146 ,  H01L27/14601 ,  H01L27/14609 ,  H01L27/14612 ,  H01L27/14643 ,  H01L27/14663 ,  H01L27/14683 ,  H01L27/14692

Abstract: A detection apparatus includes a plurality of conversion elements, an interlayer insulating layer, and a covering layer. Each of the plurality of conversion elements includes an electrode electrically connected to a corresponding one of a plurality of switching elements and a semiconductor layer disposed on the electrode. The interlayer insulating layer is disposed so as to cover the plurality of switching elements and composed of an organic material, and has a surface including a first region and a second region located outside the first region. The electrodes are disposed on the surface of the interlayer insulating layer in the first region. The covering layer is disposed on the surface of the interlayer insulating layer in the second region and composed of an inorganic material.

Abstract translation: 检测装置包括多个转换元件，层间绝缘层和覆盖层。 多个转换元件中的每一个包括电连接到多个开关元件中的相应一个的电极和设置在电极上的半导体层。 层间绝缘层被设置为覆盖多个开关元件并由有机材料构成，并且具有包括位于第一区域外部的第一区域和第二区域的表面。 电极设置在第一区域中的层间绝缘层的表面上。 覆盖层设置在第二区域中的层间绝缘层的表面上，由无机材料构成。