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公开(公告)号：US11487027B2
公开(公告)日：2022-11-01
申请号：US16929699
申请日：2020-07-15
Applicant: CANON KABUSHIKI KAISHA
Inventor： Minoru Watanabe , Kentaro Fujiyoshi , Ryosuke Miura
Abstract: An imaging region including a plurality of detection elements each including a conversion element configured to convert radiation into an electric signal, a first signal line, and a signal processing circuit configured to process a signal output via the first signal line, wherein the plurality of detection elements include a first detection element and a second detection element which are connected to the first signal line, a sensitivity of the first detection element to radiation is set to be different from a sensitivity of the second detection element to radiation, and the signal processing circuit generates information related to irradiation of radiation to the imaging region based on signals from the first detection element and the second detection element which are connected to the first signal line.
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公开(公告)号：US20220265238A1
公开(公告)日：2022-08-25
申请号：US17662898
申请日：2022-05-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Minoru Watanabe
Abstract: A radiation detection apparatus capable of monitoring a radiation dose during incidence, includes an obtaining unit configured to obtain a setting of an imaging range including a plurality of parts of an object and a setting of at least one target part that is a target of automatic exposure control in the plurality of parts, a specifying unit configured to specify, based on radiation transmission amounts set for the plurality of parts and radiation doses monitored in a plurality of detection regions of the radiation detection apparatus, at least one target detection region located at a position where radiation transmitted through the at least one target part enters from the plurality of detection regions, and an output unit configured to output the radiation dose monitored in the at least one target detection region.
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公开(公告)号：US20220247911A1
公开(公告)日：2022-08-04
申请号：US17660309
申请日：2022-04-22
Applicant: CANON KABUSHIKI KAISHA
Inventor： Minoru Watanabe
Abstract: A radiation detection apparatus includes an obtaining unit configured to obtain information representing a setting of a target region that is a target of automatic exposure control, and information representing a radiation transmission characteristic of an object corresponding to the target region, a setting unit configured to set a candidate region based on the target region, a monitoring unit configured to monitor a radiation dose during incidence in the candidate region, a specifying unit configured to specify, as a detection region, a region where the monitored radiation dose falls within a range determined in accordance with the radiation transmission characteristic, and an output unit configured to output the radiation dose monitored in the detection region.
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公开(公告)号：US20200041664A1
公开(公告)日：2020-02-06
申请号：US16594611
申请日：2019-10-07
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuya Furumoto , Minoru Watanabe , Kentaro Fujiyoshi
Abstract: A radiation image sensing apparatus is provided. The apparatus comprises an image sensing area where conversion elements are arranged and used in an image sensing operation of acquiring a radiation image, a detection element configured to detect a radiation dose of radiation entering the image sensing area, a readout unit and a controller. The controller corrects a detection signal read out from the detection element by the readout unit during incidence of radiation in a second image sensing operation performed next to a first image sensing operation, based on a correction amount acquired based on a correction signal read out from the detection element by the readout unit after an end of the incidence of the radiation in the first image sensing operation, and detects a dose of incident radiation in the second image sensing operation based on the corrected detection signal.
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公开(公告)号：US20190324156A1
公开(公告)日：2019-10-24
申请号：US16456854
申请日：2019-06-28
Applicant: CANON KABUSHIKI KAISHA
Inventor： Ryosuke Miura , Minoru Watanabe , Keigo Yokoyama , Masato Ofuji , Kentaro Fujiyoshi , Jun Kawanabe , Sho Sato , Kazuya Furumoto
Abstract: A radiation imaging apparatus includes a first detection pixel including a first switch element, a second detection pixel including a second switch element and having sensitivity which is different from that of the first detection pixel, a first signal line, a second signal line, a reading circuit which performs a first operation of reading first and second signals which appear in the first and second signal lines in a state in which the first and second switch elements are in a non-conductive state while the radiation imaging apparatus is irradiated with a radial ray and a second operation of reading third and fourth signals which appear in the first and second signal lines when the first and second switch elements are brought into a conductive state, and an information processing circuit which performs a process of generating information based on the first to fourth signals.
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Patent Agency Ranking
公开(公告)号：US10326948B2
公开(公告)日：2019-06-18
申请号：US15098224
申请日：2016-04-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroshi Wayama , Minoru Watanabe , Keigo Yokoyama , Masato Ofuji , Jun Kawanabe , Kentaro Fujiyoshi , Kazuya Furumoto
IPC: H04N5/32 , H01L27/146
Abstract: A radiation imaging apparatus includes a plurality of pixels, each of which includes a conversion element and a transistor, a plurality of drive lines connected to gates of the transistors, a drive circuit unit configured to supply a voltage to the plurality of drive lines, and a control unit configured to control the drive circuit unit. The control unit performs control of causing the drive circuit unit to apply a different voltage that is between the OFF voltage and the ON voltage and is different from the OFF voltage and the ON voltage to the plurality of drive lines in a different period different from a period in which storage control is performed and a period in which read control is performed.
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公开(公告)号：US20180321397A1
公开(公告)日：2018-11-08
申请号：US15969842
申请日：2018-05-03
Applicant: CANON KABUSHIKI KAISHA
Inventor： Jun Kawanabe , Minoru Watanabe , Keigo Yokoyama , Sho Sato , Kentaro Fujiyoshi
CPC classification number: G01T1/247 , A61B6/42 , A61B6/4233 , A61B6/54 , A61B6/542 , G01T1/023 , G01T1/026 , H04N5/32 , H04N5/3696 , H04N5/378
Abstract: A radiation imaging apparatus including conversion elements acquiring a radiation image and detectors, a readout unit and a controller is provided. In a first operation, the controller causes the readout unit to output a composition signal obtained by composing signals from the detectors, detects irradiation with radiation based on the composition signal, and shifts to a second operation. In the second operation, the controller acquires first signals individually read out from the detectors, decides a signal component, of the composition signal, which is output from a selected detector of the detectors in accordance with a ratio of the first signal from the selected detector to a sum of the first signals, and acquires an integrated dose of radiation incident on the selected detector based on the signal component and the first signal of the selected detector.
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公开(公告)号：US10068943B2
公开(公告)日：2018-09-04
申请号：US15543415
申请日：2016-03-17
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kentaro Fujiyoshi , Minoru Watanabe , Keigo Yokoyama , Masato Ofuji , Jun Kawanabe , Hiroshi Wayama , Kazuya Furumoto
IPC: H01L27/146 , A61B6/00 , H04N5/378 , H04N5/3745
Abstract: Provided is a radiation imaging apparatus, including: a plurality of pixels configured to output image signals corresponding to radiation; an image signal line configured to output the image signals; and a detection signal line configured to output a detection signal for detection of irradiation of the radiation, in which at least one of the plurality of pixels includes: a conversion element configured to convert the radiation into charge; a first switch configured to output the image signal corresponding to the charge via the image signal line; a storage capacitor including a first electrode and a second electrode, in which the first electrode is electrically connected to the conversion element to store the charge; and a second switch configured to electrically connect the second electrode and the detection signal line.
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公开(公告)号：US20180140264A1
公开(公告)日：2018-05-24
申请号：US15818427
申请日：2017-11-20
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kentaro Fujiyoshi , Minoru Watanabe , Keigo Yokoyama , Masato Ofuji , Jun Kawanabe , Sho Sato , Kazuya Furumoto , Ryosuke Miura
CPC classification number: A61B6/4233 , A61B6/54 , A61B6/542 , G01T1/247 , H04N5/32
Abstract: A radiographic imaging apparatus includes a pixel, a readout unit, and a signal processing unit. The pixel includes a switch configured to connect a conversion element configured to convert radiation into an electric signal to a signal line. The readout unit is configured to perform a first operation of reading out a first signal appearing in the signal line when the switch is not in a conductive state and a second operation of reading out a second signal appearing in the signal line when the switch is in a conductive state. The read out unit is configured to perform the first operation before performing the second operation a plurality of times consecutively. The signal processing unit is configured to perform signal processing for outputting information indicating irradiation of the radiographic imaging apparatus by the radiation based on the first signal and the second signal.
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公开(公告)号：US09924113B2
公开(公告)日：2018-03-20
申请号：US14960567
申请日：2015-12-07
Applicant: CANON KABUSHIKI KAISHA
Inventor： Jun Kawanabe , Minoru Watanabe , Keigo Yokoyama , Masato Ofuji , Kentaro Fujiyoshi , Hiroshi Wayama , Kazuya Furumoto
IPC: H04N5/32
CPC classification number: H04N5/32
Abstract: An apparatus includes a plurality of imaging pixels configured to acquire a radiation image, a plurality of detection pixels each including a detection conversion element and a detection switch element, a drive unit configured to drive the detection switch element of each of the plurality of detection pixels, a plurality of detection regions in each of which the plurality of detection pixels are arranged, a control unit configured to control the drive unit to drive the plurality of detection pixels arranged in each of the plurality of detection regions at respective different timing, and an acquisition unit configured to acquire an amount of incidence of radiation rays on each of the plurality of detection regions based on a value obtained by summing or averaging signals read out from the plurality of detection pixels.
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