# US 10,499,872 B2 · Radiation detection apparatus, radiation detection system, and method for controlling radiation detection apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,499,872 B2 - Document ID: US10499872B2 - Status: Granted - Kind: B2 - Application number: 15/341,787 - Filed: 2016-11-02 - Published: 2017-05-11 - Granted: 2019-12-10 - Earliest claimed: 2015-11-05 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Masato Ofuji; Minoru Watanabe; Keigo Yokoyama; Jun Kawanabe; Kazuya Furumoto - Web page: https://patentgrep.com/patent/US10499872B2 ## CPC - A61B 6/54: {Control of apparatus or devices for radiation diagnosis} - A61B 6/4233: {using matrix detectors} - H04N 23/30: for generating image signals from X-rays - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract An apparatus includes a plurality of detection pixels configured to generate a signal according to a radiation irradiation amount to obtain radiation irradiation information, a detection unit configured to correspond to a region of the plurality of detection pixels and detect one of light, pressure, capacitance, and temperature as two-dimensional information, and a control unit configured to determine a monitoring target detection pixel and a non-monitoring-target detection pixel among the plurality of detection pixels based on the two-dimensional information detected by the detection unit, read the signals of detection pixels of a row in which the monitoring target detection pixel is included. ## Claims ### Claim 1 An apparatus comprising: a plurality of detection pixels configured to generate a signal according to a radiation irradiation amount to obtain radiation irradiation information; a detection unit configured to correspond to a region of the plurality of detection pixels and detect one of light which is irradiated to the apparatus from a visible light source; and a control unit configured to determine a monitoring target detection pixel and a non-monitoring-target detection pixel among the plurality of detection pixels based on two-dimensional information, read the signals of detection pixels of a row in which the monitoring target detection pixel is included. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the detection unit detects an irradiation field of radiations or a position of an object based on the two-dimensional information, and wherein the control unit determines the monitoring target detection pixel and the non-monitoring-target detection pixel among the plurality of detection pixels based on the irradiation field of the radiations or the position of the object, read the signals of the detection pixels of the row in which the monitoring target detection pixel is included, and not read the signals of the detection pixels of a row in which the monitoring target detection pixel is not included. ### Claim 3 (depends on 1) The apparatus according to claim 1, further comprising a plurality of normal pixels configured to generate a signal according to the irradiation amount to generate a two-dimensional image, wherein the plurality of detection pixels is arranged in a region of the plurality of normal pixels in order to obtain the radiation irradiation information regarding radiations irradiated when the two-dimensional image is generated by the plurality of normal pixels, and wherein the control unit, if a cumulative irradiation amount based on the signals of the detection pixels of the read row exceeds a threshold, outputs an irradiation stop signal and reads the signals of the plurality of normal pixels. ### Claim 4 (depends on 1) The apparatus according to claim 1, further comprising a plurality of normal pixels configured to generate a signal according to the irradiation amount to generate a two-dimensional image, wherein the plurality of detection pixels is arranged in a region of the plurality of normal pixels, and wherein the control unit, if the read row is a row including a region of interest and the cumulative irradiation amount based on the signals of the detection pixels of the read row exceeds a threshold, outputs an irradiation stop signal and reads the signals of the plurality of normal pixels. ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein the control unit recognizes a body part of an object based on the two-dimensional information, and determines the monitoring target detection pixel and the non-monitoring-target detection pixel among the plurality of detection pixels based on the recognized body part of the object. ### Claim 6 (depends on 1) The apparatus according to claim 1, wherein the plurality of detection pixels also serves as the detection unit. ### Claim 7 (depends on 1) The apparatus according to claim 1, wherein the plurality of detection pixels includes a plurality of switch elements for reading the signals of the plurality of detection pixels, respectively, and wherein the control unit brings the switch elements of the detection pixels of the row in which the monitoring target detection pixel is included, into a conducting state on a row-by-row basis, reads the signals of the detection pixels of the row in which the monitoring target detection pixel is included on a row-by-row basis, and maintains the switch elements of the detection pixels of the row in which the monitoring target detection pixel is not included, in a non-conducting state. ### Claim 8 (depends on 1) The apparatus according to claim 1, further comprising a reading circuit configured to process the signal read from the monitoring target detection pixel and to suspend processing of the signal read from the non-monitoring-target detection pixel. ### Claim 9 (depends on 1) The apparatus according to claim 1, wherein the detection unit detects the two-dimensional information before the irradiation, and wherein the control unit determines the monitoring target detection pixel and the non-monitoring-target detection pixel among the plurality of detection pixels before the radiation irradiation, and reads the signals of the detection signals of the row in which the monitoring target detection pixel is included during the irradiation. ### Claim 10 (depends on 1) The apparatus according to claim 1, wherein the detection unit detects an irradiation field of radiations or a position of an object. ### Claim 11 (depends on 1) A system comprising: the apparatus according to claim 1; and a radiation source configured to emit radiations. ### Claim 12 A method for controlling an apparatus including a plurality of detection pixels configured to generate a signal according to a radiation irradiation amount to obtain radiation irradiation information, and a detection unit configured to correspond to a region of the plurality of detection pixels and detect one of light which is irradiated to the apparatus from a visible light source, the method comprising: determining a monitoring target detection pixel and a non-monitoring-target detection pixel among the plurality of detection pixels based on two-dimensional information; and reading the signals of detection pixels of a row in which the monitoring target detection pixel is included. ### Claim 13 (depends on 12) The method according to claim 12, further comprising: detecting an irradiation field of radiations or a position of an object based on the two-dimensional information; determining the monitoring target detection pixel and the non-monitoring-target detection pixel among the plurality of detection pixels based on the irradiation field of the radiations or the position of the object; and reading by the control unit the signals of detection pixels of the row in which the monitoring target detection pixel is included, and not reading the signals of detection pixels of a row in which the monitoring target detection pixel is not included. ### Claim 14 (depends on 12) The method according to claim 12, further comprising generating a signal according to the irradiation amount to generate a two-dimensional image by a plurality of normal pixels, wherein the plurality of detection pixels is arranged in a region of the plurality of normal pixels in order to obtain the radiation irradiation information regarding radiations irradiated when the two-dimensional image is generated by the plurality of normal pixels, and wherein, if a cumulative irradiation amount based on the signals of the detection pixels of the read row exceeds a threshold, outputting an irradiation stop signal and reading the signals of the plurality of normal pixels. ### Claim 15 (depends on 12) The method according to claim 12, further comprising generating a signal according to the irradiation amount to generate a two-dimensional image by a plurality of normal pixels, wherein the plurality of detection pixels is arranged in a region of the plurality of normal pixels in order to obtain the radiation irradiation information regarding radiations irradiated when the two-dimensional image is generated by the plurality of normal pixels, and wherein, if the read row is a row including a region of interest and the cumulative irradiation amount based on the signals of the detection pixels of the read row exceeds a threshold, outputs an irradiation stop signal and reads the signals of the plurality of normal pixels. ### Claim 16 (depends on 12) The method according to claim 12, further comprising: recognizing a body part of an object based on the two-dimensional information; and determining the monitoring target detection pixel and the non-monitoring-target detection pixel among the plurality of detection pixels based on the recognized body part of the object. ### Claim 17 (depends on 12) The method according to claim 12, wherein the plurality of detection pixels includes a plurality of switch elements for reading the signals of the plurality of detection pixels, respectively, and wherein the method further comprising: bringing the switch elements of the detection pixels of the row in which the monitoring target detection pixel is included into a conducting state on a row-by-row basis, reading the signals of the detection pixels of the row in which the monitoring target detection pixel is included on a row-by-row basis, and maintaining the switch elements of the detection pixels of the row in which the monitoring target detection pixel is not included, in a non-conducting state. ### Claim 18 (depends on 12) The method according to claim 12, further comprising processing the signal read from the monitoring target detection pixel and suspending processing of the signal read from the non-monitoring-target detection pixel. ### Claim 19 (depends on 1) The apparatus according to claim 1, wherein the first light is visible light or infrared rays. ### Claim 20 (depends on 1) The apparatus according to claim 1, further comprising a scintillator configured to convert the radiation into the second light, and the first light is not emitted from the scintillator.