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公开(公告)号：EP4094691A1
公开(公告)日：2022-11-30
申请号：EP21764403.8
申请日：2021-03-01
IPC分类号： A61B6/00
摘要： A radiation imaging system comprises a sensor unit of a radiation imaging device 120, detecting an incident radiation R irradiated from a radiation generator 110; an arithmetic unit 132 calculating an accumulated dose of the radiation detected by the sensor unit; and an imaging control unit outputting an irradiation stop signal for stopping the irradiation of the radiation R to the radiation generator 110 when the accumulated dose reaches a threshold or more, wherein the imaging control unit 133 sets the threshold based on a dose rate of the radiation R determined based on a relationship between the accumulated dose and a time, and a delay time from a time of outputting the irradiation stop signal to a time of stopping the irradiation of the radiation of the radiation generator 110.
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公开(公告)号：EP3298772A1
公开(公告)日：2018-03-28
申请号：EP16799506.7
申请日：2016-03-31
发明人： WATANABE, Minoru , YOKOYAMA, Keigo , OFUJI, Masato , KAWANABE, Jun , FUJIYOSHI, Kentaro , WAYAMA, Hiroshi , FURUMOTO, Kazuya
IPC分类号： H04N5/32 , A61B6/00 , G01T1/17 , G01T1/20 , G01T7/00 , H01L27/144 , H01L27/146 , H04N5/357 , H04N5/374
摘要： A radiation imaging apparatus is provided. The apparatus comprises pixels arranged in an image sensing region, a first and a second detecting elements configured to obtain radiation irradiation information, a first signal line to which a signal from the first detecting element is to be output and a second signal line to which a signal from the second detecting element is to be output, and a signal processing circuit configured to process the signals output from the first and the second detecting elements. The first the second signal lines are arranged in the image sensing region or arranged adjacent to the image sensing region, the first detecting element has a larger region to detect radiation than the second detecting element. The signal processing circuit generates the radiation irradiation information based on the signals from the first and the second signal lines.
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公开(公告)号：EP4358532A1
公开(公告)日：2024-04-24
申请号：EP23211422.3
申请日：2020-11-04
发明人： OFUJI, Masato , KAWANABE, Jun , FUJIYOSHI, Kentaro , WATANABE, Minoru , SUZUKI, Kai , OKADA, Hideyuki
IPC分类号： H04N25/617 , H04N25/709 , H04N25/75 , H04N25/76
CPC分类号： H04N25/617 , H04N25/709 , H04N25/76 , H04N25/75 , H04N25/30
摘要： A radiation imaging apparatus (100) comprises a pixel unit (101) in which a plurality of pixels (200) each including a conversion element (202) configured to convert radiation into charges, and a switch element (201) are arranged in a matrix, a driving circuit (214) configured to control the switch elements (201) via a plurality of drive lines (Vg) extending in a row direction, a bias power supply unit (104) configured to supply a bias potential to the conversion element (202) via a bias line (Bs), a plurality of column signal lines (Sig) to which signals are output from the plurality of pixels (200) via the switch elements (201) and a detection unit (106). The plurality of pixels (200) include a first pixel (200a) and a second pixel (200b), which are adjacent to each other in the row direction and are connected to a common column signal line in the plurality of column signal lines (Sig), the switch element (201) of the first pixel (200a) and the switch element (201) of the second pixel (200b) are connected to drive lines different from each other in the plurality of drive lines (Vg), and the detection unit (106) determines presence/absence of radiation irradiation based on a current flowing to the bias line (Bs), the bias power supply unit includes a first bias power supply unit and a second bias power supply unit, the bias line includes a first bias line connected to the first bias power supply unit, and a second bias line connected to the second bias power supply unit and electrically independent of the first bias line, the conversion element of the first pixel is connected to the first bias power supply unit via the first bias line, and the conversion element of the second pixel is connected to the second bias power supply unit via the second bias line. The detection unit acquires a first signal value representing a current flowing to the first bias line when the switch element of a pixel in pixels whose conversion elements are connected to the first bias power supply unit in the plurality of pixels is in a conduction state, and a second signal value representing a current flowing to the second bias line when the switch element of a pixel whose conversion element is connected to the second bias power supply unit in the plurality of pixels is in a non-conduction state such that sampling timings at least partially overlap, and determines the presence/absence of radiation irradiation based on the first signal value and the second signal value.
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公开(公告)号：EP3823268A1
公开(公告)日：2021-05-19
申请号：EP20205658.6
申请日：2020-11-04
发明人： OFUJI, Masato , KAWANABE, Jun , FUJIYOSHI, Kentaro , WATANABE, Minoru , SUZUKI, Kai , OKADA, Hideyuki
摘要： A radiation imaging apparatus (100) is provided. The apparatus (100) comprises a plurality of pixels (200) each including a conversion element (202) and a switch (201), a driving circuit (214) configured to control the switches (201) via drive lines (Vg), a bias power supply unit (104) configured to supply a bias potential to the conversion element (202) via a bias line (Bs), column signal lines (sig) to which signals are output from the plurality of pixels (200), and a detection unit (106). The plurality of pixels (200) include a first pixel (200a) and a second pixel (200b), which are adjacent to each other in the row direction and are connected to a common column signal line (sig). The switch (201) of the first pixel (200a) and the switch (201) of the second pixel (200b) are connected to drive lines (Vg) different from each other. The detection unit (106) determines presence/absence of radiation irradiation based on a current flowing to the bias line (Bs).
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公开(公告)号：EP3661190A1
公开(公告)日：2020-06-03
申请号：EP19208232.9
申请日：2019-11-11
摘要： A radiation imaging apparatus (100) includes a first pixel (104), and a second pixel (107) whose sensitivity for radiation is lower than sensitivity of the first pixel; and a decision means(180) configured to execute a reset operation of resetting charges in the pixels and a decision operation of deciding a radiation dose during irradiation to the apparatus. In the decision operation, the decision means reads out signals from the first and second pixels at least once, and decides first and second correction values based on the signal read out from the first and second pixel respectively, and reads out signals from the first and second pixels after receiving a radiation irradiation start request, and decides the radiation dose during irradiation to the apparatus using values of the signals read out from the first and second pixels and the first and second correction values.
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公开(公告)号：EP3298772B1
公开(公告)日：2020-02-19
申请号：EP16799506.7
申请日：2016-03-31
发明人： WATANABE, Minoru , YOKOYAMA, Keigo , OFUJI, Masato , KAWANABE, Jun , FUJIYOSHI, Kentaro , WAYAMA, Hiroshi , FURUMOTO, Kazuya
IPC分类号： H04N5/32 , A61B6/00 , G01T1/17 , G01T1/20 , G01T7/00 , H01L27/144 , H01L27/146 , H04N5/357 , H04N5/374
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