# US 9,753,159 B2 · Radiographic imaging control device, radiographic imaging system, radiographic imaging device control method, and recording medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,753,159 B2 - Document ID: US9753159B2 - Status: Granted - Kind: B2 - Application number: 14/264,285 - Filed: 2014-04-29 - Published: 2014-08-21 - Granted: 2017-09-05 - Earliest claimed: 2012-02-22 - Assignees: FUJIFILM Corporation - Applicants: FUJIFILM Corporation - Inventors: Naoto Iwakiri; Kouichi Kitano - Web page: https://patentgrep.com/patent/US9753159B2 ## CPC - G01T 1/247: {Detector read-out circuitry (for processing gain or off-set correction H04N)} - A61B 6/42: Arrangements for detecting radiation specially adapted for radiation diagnosis - A61B 6/5258: {involving detection or reduction of artifacts or noise} - G01T 1/17: Circuit arrangements not adapted to a particular type of detector {(pulse-selection circuits H03K, G01R)} - G01T 1/208: Circuits specially adapted for scintillation detectors, e.g. for the photo-multiplier section - H03K 21/38: Starting, stopping or resetting the counter (counters with a base other than a power of two H03K23/48, H03K23/66) - H04N 23/30: for generating image signals from X-rays - H04N 25/766: comprising control or output lines used for a plurality of functions, e.g. for pixel output, driving, reset or power - H10F 39/195: {X-ray, gamma-ray or corpuscular radiation imagers} - H10F 39/80: {Constructional details of image sensors} - H10F 39/803: {Pixels having integrated switching, control, storage or amplification elements} - H10F 39/8037: {the integrated elements comprising a transistor} - H10F 39/811: {Interconnections} - A61B 6/4233: {using matrix detectors} - A61B 6/4283: {characterised by a detector unit being housed in a cassette} - A61B 6/54: {Control of apparatus or devices for radiation diagnosis} - H04N 25/42: by switching between different modes of operation using different resolutions or aspect ratios, e.g. switching between interlaced and non-interlaced mode - H04N 25/778: comprising amplifiers shared between a plurality of pixels, i.e. at least one part of the amplifier must be on the sensor array itself - H04N 25/78: Readout circuits for addressed sensors, e.g. output amplifiers or A/D converters - H10F 39/12: Image sensors - H10F 39/189: {X-ray, gamma-ray or corpuscular radiation imagers} - G01T: MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N23/00; tubes for determining the presence, intensity, density or energy of radiation or particles H01J47/00) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION ## Abstract A radiographic imaging control device is provided with a radiation detector, amplifiers and a controller. A plurality of pixels are arrayed in the radiation detector, each pixel including a sensor portion that generates charges in accordance with irradiated radiation and a switching element that is for reading out the charges generated at the sensor portion. Each amplifier is provided in correspondence with a respective pixel of the radiation detector, is equipped with a resetter that resets charges remaining at an integration capacitor, and amplifies an electronic signal according to the charges read out by the switching element from the corresponding pixel by a pre-specified amplification factor. In accordance with pre-specified conditions, the controller controls so as to alter a bias current supplied to the amplifiers in at least some periods of resetting by the resetter. ## Claims ### Claim 1 A radiographic imaging system control device comprising: a radiation detector in which a plurality of pixels are arrayed, each pixel including a sensor portion that generates charges in accordance with incident radiation and a switching element that is for reading out the charges generated at the sensor portion; an amplifier that is provided in correspondence with a respective pixel of the radiation detector, wherein said amplifier is equipped with a resetter that resets charges remaining at an integration capacitor, and amplifies an electronic signal according to the charges read out by the switching element from the corresponding pixel by a pre-specified amplification factor; and a controller with processing circuitry configured to, in accordance with a pre-specified condition, control the radiographic imaging system so as to alter a bias current supplied to the amplifier in at least some periods of resetting by the resetter, wherein the processing circuitry of the controller further controls so as to alter a reset duration by the resetter in accordance with the alteration of the bias current. ### Claim 2 (depends on 1) The radiographic imaging control device according to claim 1, wherein the controller controls so as to increase the bias current. ### Claim 3 (depends on 1) The radiographic imaging control device according to claim 1, wherein, in a case of imaging a video image, the controller controls so as to increase the bias current relative to a case of imaging a still image. ### Claim 4 (depends on 1) The radiographic imaging control device according to claim 1, wherein, in a case of imaging a video image, the controller controls so as to increase the bias current and shorten the reset duration relative to a case of imaging a still image. ### Claim 5 (depends on 1) The radiographic imaging control device according to claim 1, further comprising a communicator that implements wired communication when a video image is being imaged and implements wireless communication when a still image is being imaged, wherein the controller controls so as to alter the bias current in accordance with a communication state of the communicator. ### Claim 6 (depends on 1) A radiographic imaging system comprising: a radiographic imaging control device according to claim 1; and a radiation source that emits radiation toward the radiation detector through an imaging subject. ### Claim 7 A radiographic imaging device control method comprising: (a) with a resetter of an amplifier, resetting charges remaining at an integration capacitor before imaging, the amplifier being provided in correspondence with a respective pixel of a radiation detector in which a plurality of the pixels are arrayed, each pixel including a sensor portion that generates charges in accordance with incident radiation and a switching element that is for reading out the charges generated at the sensor portion, and wherein the amplifier is equipped with the resetter that resets the remaining charges and amplifies an electronic signal according to the charges read out by the switching element from the corresponding pixel by a pre-specified amplification factor; and (b) in accordance with a pre-specified condition, controlling the radiographic imaging device so as to alter a bias current supplied to the amplifier in at least some periods of resetting by the resetter in (a), wherein the controller further controls so as to alter a reset duration by the resetter in accordance with the alteration of the bias current. ### Claim 8 (depends on 7) The radiographic imaging device control method according to claim 7, wherein (b) further includes controlling so as to alter a reset duration by the resetter in accordance with the alteration of the bias current. ### Claim 9 (depends on 7) The radiographic imaging device control method according to claim 7, wherein (b) includes controlling so as to increase the bias current. ### Claim 10 (depends on 7) The radiographic imaging device control method according to claim 7, wherein, in a case of imaging a video image, (b) includes controlling so as to increase the bias current relative to a case of imaging a still image. ### Claim 11 (depends on 7) The radiographic imaging device control method according to claim 7, wherein, in a case of imaging a video image, (b) includes controlling so as to increase the bias current and shorten the reset duration relative to a case of imaging a still image. ### Claim 12 (depends on 7) The radiographic imaging device control method according to claim 7, wherein (b) includes controlling so as to alter the bias current in accordance with a communication state of a communicator that implements wired communication when a video image is being imaged and implements wireless communication when a still image is being imaged. ### Claim 13 A non-transitory recording medium storing a radiographic imaging system control program that causes a computer to execute a process comprising: (a) with a resetter of an amplifier, resetting charges remaining at an integration capacitor before imaging, the amplifier being provided in correspondence with a respective pixel of a radiation detector in which a plurality of the pixels are arrayed, each pixel including a sensor portion that generates charges in accordance with incident radiation and a switching element that is for reading out the charges generated at the sensor portion, and wherein the amplifier is equipped with the resetter that resets the remaining charges and amplifies an electronic signal according to the charges read out by the switching element from the corresponding pixel by a pre-specified amplification factor; and (b) in accordance with a pre-specified condition, controlling the radiographic imaging system so as to alter a bias current supplied to the amplifier in at least some periods of resetting by the resetter in (a), wherein the controller further controls so as to alter a reset duration by the resetter in accordance with the alteration of the bias current. ### Claim 14 (depends on 13) The recording medium according to claim 13, wherein (b) further includes controlling so as to alter a reset duration by the resetter in accordance with the alteration of the bias current. ### Claim 15 (depends on 13) The recording medium according to claim 13, wherein (b) includes controlling so as to increase the bias current. ### Claim 16 (depends on 15) The recording medium according to claim 15, wherein, in a case of imaging a video image, (b) includes controlling so as to increase the bias current relative to in a case of imaging a still image. ### Claim 17 (depends on 15) The recording medium according to claim 15, wherein, in a case of imaging a video image, (b) includes controlling so as to increase the bias current and shorten the reset duration relative to a case of imaging a still image. ### Claim 18 (depends on 13) The recording medium according to any one of claim 13, wherein (b) includes controlling so as to alter the bias current in accordance with a communication state of a communicator that implements wired communication when a video image is being imaged and implements wireless communication when a still image is being imaged.