# US 8,785,863 B2 · Radiation detection device, control method for radiation detection device, and computer-readable medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,863 B2 - Document ID: US8785863B2 - Status: Granted - Kind: B2 - Application number: 13/944,456 - Filed: 2013-07-17 - Published: 2014-01-23 - Granted: 2014-07-22 - Earliest claimed: 2012-07-19 - Assignees: FUJIFILM Corporation - Applicants: Fujifilm Corporation - Inventors: Yasufumi Oda - Web page: https://patentgrep.com/patent/US8785863B2 ## CPC - G01T 1/17: Circuit arrangements not adapted to a particular type of detector {(pulse-selection circuits H03K, G01R)} - H10F 39/1898: {Indirect radiation image sensors, e.g. using luminescent members} - 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) - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION ## Abstract A radiation detection device including a radiation detection unit, a profile information acquisition unit, a control condition determination unit and a controller. The radiation detection unit converts radiation irradiated from a radiation irradiation device to charges and accumulates the charges. The profile information acquisition unit acquires profile information representing a change per unit time of radiation amounts of the radiation irradiated from the radiation irradiation device. The control condition determination unit determines a control condition of the radiation detection unit on the basis of the profile information acquired by the profile information acquisition unit. The controller controls the radiation detection unit in accordance with the control condition determined by the control condition determination unit. ## Claims ### Claim 1 A radiation detection device comprising: a radiation detection unit that converts radiation irradiated from a radiation irradiation device to charges and accumulates the charges; a profile information acquisition unit that acquires profile information representing a change per unit time of radiation amounts of the radiation irradiated from the radiation irradiation device; a control condition determination unit that determines a control condition of the radiation detection unit on the basis of the profile information acquired by the profile information acquisition unit; and a controller that controls the radiation detection unit in accordance with the control condition determined by the control condition determination unit. ### Claim 2 (depends on 1) The radiation detection device according to claim 1, wherein the control condition determination unit includes a threshold setting unit that, on the basis of the acquired profile information, sets a threshold corresponding to an amount of change per unit time of radiation amounts of irradiated radiation, and if an amount of change per unit time of radiation amounts of irradiated radiation is at least the threshold set by the threshold setting unit, the controller controls the radiation detection unit. ### Claim 3 (depends on 2) The radiation detection device according to claim 2, wherein the profile information acquisition unit acquires the profile information of the radiation irradiation device on the basis of radiation amounts of radiation irradiated from the radiation irradiation device and detected by the radiation detection device. ### Claim 4 (depends on 2) The radiation detection device according to claim 2, wherein the radiation detection unit comprises: pixels for radiation detection from which the charges to which radiation irradiated from the radiation irradiation device is converted are continuously read out; and pixels for radiation image capture that are equipped with switching elements for reading out the charges, and wherein the controller controls the pixels for radiation image capture in accordance with the radiation detected at the pixels for radiation detection and the control condition of the radiation detection unit. ### Claim 5 (depends on 2) The radiation detection device according to claim 2, wherein the profile information acquisition unit acquires rising profile information representing changes over time of radiation amounts of the radiation irradiated from the radiation irradiation device, from the start of an irradiation until a predetermined radiation amount is reached, the control condition determination unit determines a charge accumulation start condition of the radiation detection unit on the basis of the rising profile information acquired by the profile information acquisition unit, and the controller starts charge accumulation at the radiation detection unit in accordance with the accumulation start condition determined by the control condition determination unit. ### Claim 6 (depends on 2) The radiation detection device according to claim 2, wherein the profile information acquisition unit acquires falling profile information representing changes over time of radiation amounts of the radiation irradiated from the radiation irradiation device, from a predetermined radiation amount until a minimum radiation amount is reached, the control condition determination unit determines a charge accumulation end condition of the radiation detection unit on the basis of the falling profile information acquired by the profile information acquisition unit, and the controller ends charge accumulation at the radiation detection unit in accordance with the accumulation end condition determined by the control condition determination unit. ### Claim 7 (depends on 2) The radiation detection device according to claim 2, further comprising a storage unit that stores respective profile information of a plurality of kinds of the radiation irradiation device. ### Claim 8 (depends on 2) The radiation detection device according to claim 2, further comprising a storage unit that stores respective control conditions of the radiation detection unit in correspondence with respective profile information of a plurality of kinds of the radiation irradiation device. ### Claim 9 (depends on 1) The radiation detection device according to claim 1, wherein the control condition determination unit includes a threshold setting unit that, on the basis of the acquired profile information, sets a threshold and a designated number of times, and if a number of times that an amount of change per unit time of radiation amounts of irradiated radiation is at least the threshold set by the threshold setting unit reaches the designated number of times, the controller controls the radiation detection unit. ### Claim 10 (depends on 9) The radiation detection device according to claim 9, wherein the profile information acquisition unit acquires the profile information of the radiation irradiation device on the basis of radiation amounts of radiation irradiated from the radiation irradiation device and detected by the radiation detection device. ### Claim 11 (depends on 9) The radiation detection device according to claim 9, wherein the radiation detection unit comprises: pixels for radiation detection from which the charges to which radiation irradiated from the radiation irradiation device is converted are continuously read out; and pixels for radiation image capture that are equipped with switching elements for reading out the charges, and wherein the controller controls the pixels for radiation image capture in accordance with the radiation detected at the pixels for radiation detection and the control condition of the radiation detection unit. ### Claim 12 (depends on 9) The radiation detection device according to claim 9, wherein the profile information acquisition unit acquires rising profile information representing changes over time of radiation amounts of the radiation irradiated from the radiation irradiation device, from the start of an irradiation until a predetermined radiation amount is reached, the control condition determination unit determines a charge accumulation start condition of the radiation detection unit on the basis of the rising profile information acquired by the profile information acquisition unit, and the controller starts charge accumulation at the radiation detection unit in accordance with the accumulation start condition determined by the control condition determination unit. ### Claim 13 (depends on 1) The radiation detection device according to claim 1, wherein the profile information acquisition unit acquires the profile information of the radiation irradiation device on the basis of radiation amounts of radiation irradiated from the radiation irradiation device and detected by the radiation detection device. ### Claim 14 (depends on 1) The radiation detection device according to claim 1, wherein the radiation detection unit comprises: pixels for radiation detection from which the charges to which radiation irradiated from the radiation irradiation device is converted are continuously read out; and pixels for radiation image capture that are equipped with switching elements for reading out the charges, and wherein the controller controls the pixels for radiation image capture in accordance with the radiation detected at the pixels for radiation detection and the control condition of the radiation detection unit. ### Claim 15 (depends on 1) The radiation detection device according to claim 1, wherein the profile information acquisition unit acquires rising profile information representing changes over time of radiation amounts of the radiation irradiated from the radiation irradiation device, from the start of an irradiation until a predetermined radiation amount is reached, the control condition determination unit determines a charge accumulation start condition of the radiation detection unit on the basis of the rising profile information acquired by the profile information acquisition unit, and the controller starts charge accumulation at the radiation detection unit in accordance with the accumulation start condition determined by the control condition determination unit. ### Claim 16 (depends on 1) The radiation detection device according to claim 1, wherein the profile information acquisition unit acquires falling profile information representing changes over time of radiation amounts of the radiation irradiated from the radiation irradiation device, from a predetermined radiation amount until a minimum radiation amount is reached, the control condition determination unit determines a charge accumulation end condition of the radiation detection unit on the basis of the falling profile information acquired by the profile information acquisition unit, and the controller ends charge accumulation at the radiation detection unit in accordance with the accumulation end condition determined by the control condition determination unit. ### Claim 17 (depends on 1) The radiation detection device according to claim 1, further comprising a storage unit that stores respective profile information of a plurality of kinds of the radiation irradiation device. ### Claim 18 (depends on 1) The radiation detection device according to claim 1, further comprising a storage unit that stores respective control conditions of the radiation detection unit in correspondence with respective profile information of a plurality of kinds of the radiation irradiation device. ### Claim 19 A non-transient computer readable medium storing a program causing a computer to execute a process for controlling a radiation detection device, the process comprising: acquiring profile information representing a change per unit time of radiation amounts of radiation irradiated from a radiation irradiation device; determining a control condition of a radiation detection unit on the basis of the acquired profile information, the radiation detection unit converting radiation irradiated from the radiation irradiation device to charges and accumulating the charges; and controlling the radiation detection unit in accordance with the determined control condition. ### Claim 20 A control method for a radiation detection device, the method comprising: acquiring profile information representing a change per unit time of radiation amounts of radiation irradiated from a radiation irradiation device; determining a control condition of a radiation detection unit on the basis of the acquired profile information, the radiation detection unit converting radiation irradiated from the radiation irradiation device to charges and accumulating the charges; and controlling the radiation detection unit in accordance with the determined control condition.