# US 11,029,419 B2 · Radiation detector suitable for a pulsed radiation source > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,419 B2 - Document ID: US11029419B2 - Status: Granted - Kind: B2 - Application number: 16/170,545 - Filed: 2018-10-25 - Published: 2019-02-28 - Granted: 2021-06-08 - Earliest claimed: 2016-10-18 - Assignees: Shenzhen Xpectvision Technology Co., Ltd. - Applicants: Shenzhen Xpectvision Technology Co., Ltd. - Inventors: Peiyan Cao; Yurun Liu - Web page: https://patentgrep.com/patent/US11029419B2 ## CPC - G01T 1/17: Circuit arrangements not adapted to a particular type of detector {(pulse-selection circuits H03K, G01R)} - A61B 6/42: Arrangements for detecting radiation specially adapted for radiation diagnosis - G01T 1/16: Measuring radiation intensity (G01T1/29 takes precedence {; self-powered detectors G01T3/006; using an ionisation chamber filled with a liquid or solid, e.g. frozen liquid, dielectric G01T3/008}) - G01T 7/005: {calibration techniques (stabilization of spectrometer G01T1/40)} - H04N 25/30: for transforming X-rays into image signals - H04N 25/63: applied to dark current - 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) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Disclosed herein is a radiation detector, comprising: a plurality of pixels, and a controller; wherein each pixel is configured to detect radiation emitted from a pulsed radiation source; wherein the pulsed radiation source is configured to emit radiation during a plurality of ON periods and configured not to emit radiation during a plurality of OFF periods; wherein the controller is configured to determine that the pulsed radiation source is at one of the ON periods or at one of the OFF periods; wherein the controller is configured to cause the pixels to integrate signals or not to integrate signals with determination that the radiation source is at one of the ON periods or at one of the OFF periods. ## Claims ### Claim 1 A radiation detector, comprising: pixels, and a controller; wherein each of the pixels is configured to detect radiation emitted from a pulsed radiation source; wherein the pulsed radiation source is configured to emit radiation during ON periods and configured not to emit radiation during OFF periods; wherein the controller is configured to determine that the pulsed radiation source is at one ON period of the ON periods or at one OFF period of the OFF periods; wherein the controller is configured to cause the pixels to integrate signals with determination that the radiation source is at the one ON period and the controller is configured to cause the pixels not to integrate signals with determination that the radiation source is at the one OFF period; wherein the radiation is X-ray. ### Claim 2 (depends on 1) The radiation detector of claim 1, wherein the signals during the ON periods comprise signals attributable to radiation from the pulsed radiation source and signals attributable to dark noise. ### Claim 3 (depends on 1) The radiation detector of claim 1, wherein the signals during the OFF periods comprise signals attributable to dark noise but not signals attributable to radiation from the pulsed radiation source. ### Claim 4 (depends on 1) The radiation detector of claim 1, wherein the controller is configured to cause the pixels to integrate signals during all of the ON periods. ### Claim 5 (depends on 1) The radiation detector of claim 1, wherein the controller is configured to cause the pixels not to integrate signals during all of the OFF periods. ### Claim 6 (depends on 1) The radiation detector of claim 1, wherein the controller is configured to process, during the OFF periods, signals of the pixels integrated. ### Claim 7 (depends on 1) The radiation detector of claim 1, wherein the controller is configured to digitize, during the OFF periods, signals of the pixels integrated. ### Claim 8 (depends on 1) The radiation detector of claim 1, wherein the controller is configured to reset signals of the pixels integrated. ### Claim 9 (depends on 1) The radiation detector of claim 1, wherein the radiation detector and the pulsed radiation source are synchronized to a same clock. ### Claim 10 (depends on 9) The radiation detector of claim 9, wherein the controller is configured to determine that the pulsed radiation source is at the one ON period or at the one OFF period based on a clock signal from the clock. ### Claim 11 (depends on 1) The radiation detector of claim 1, wherein the radiation detector comprises a device configured to detect an intensity of the radiation from the pulsed radiation source as a function of time. ### Claim 12 (depends on 11) The radiation detector of claim 11, wherein the device has a lower shot noise than the pixels. ### Claim 13 (depends on 11) The radiation detector of claim 11, wherein the controller is configured to determine that the pulsed radiation source is at the one ON period or at the one OFF period based on the intensity of the radiation. ### Claim 14 (depends on 1) The radiation detector of claim 1, wherein the controller is configured to determine that the pulsed radiation source is at the one ON period or at the one OFF period, using the pixels. ### Claim 15 (depends on 14) The radiation detector of claim 14, wherein the controller is configured to determine that the pulsed radiation source is at the one ON period or at the one OFF period, based on a combined signal of a plurality of the pixels. ### Claim 16 (depends on 1) The radiation detector of claim 1, wherein exposure of the pixels to the radiation is synchronized. ### Claim 17 (depends on 1) A system comprising the radiation detector of claim 1 and the pulsed radiation source. ### Claim 18 (depends on 17) The system of claim 17, wherein the system is configured to perform X-ray radiography on human chest or abdomen, to perform X-ray radiography on human mouth, to form an image using backscattered radiation, or to form an image using radiation transmitted through an object inspected. ### Claim 19 (depends on 1) The radiation detector of claim 1, wherein the controller is configured to cause the pixels to integrate the signals during two neighboring ON periods without resetting the signals between the two neighboring ON periods. ### Claim 20 A radiation detector: wherein the radiation detector is configured to detect radiation from a pulsed radiation source; wherein the pulsed radiation source is configured to emit radiation during ON periods and configured not to emit radiation during OFF periods; wherein the radiation detector is configured to determine that the pulsed radiation source is at one ON period of the ON periods or at one OFF period of the OFF periods; wherein the radiation detector is configured to integrate signals with determination that the radiation source is at the one ON period and the controller is configured not to integrate signals with determination that the radiation source is at the one OFF period; wherein the radiation is X-ray. ### Claim 21 (depends on 20) The radiation detector of claim 20, wherein the ON periods and the OFF periods have adjustable lengths. ### Claim 22 (depends on 20) The radiation detector of claim 20, wherein the signals during the ON periods comprise signals attributable to radiation from the pulsed radiation source and signals attributable to dark noise. ### Claim 23 (depends on 20) The radiation detector of claim 20, wherein the signals during the OFF periods comprise signals attributable to dark noise but not signals attributable to radiation from the pulsed radiation source. ### Claim 24 (depends on 20) A system comprising the radiation detector of claim 20 and the pulsed radiation source. ### Claim 25 (depends on 24) The system of claim 24, wherein the system is configured to perform X-ray radiography on human chest or abdomen, to perform X-ray radiography on human mouth, to form an image using backscattered radiation, or to form an image using radiation transmitted through an object inspected. ### Claim 26 (depends on 20) The radiation detector of claim 20, wherein the radiation detector is configured to integrate the signals during two neighboring ON periods without resetting the signals between the two neighboring ON periods.