# US 12,000,970 B2 · System and method for charge sharing compensation for X-ray photon counting detectors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,970 B2 - Document ID: US12000970B2 - Status: Granted - Kind: B2 - Application number: 17/602,962 - Filed: 2020-05-01 - Published: 2022-06-16 - Granted: 2024-06-04 - Earliest claimed: 2019-05-01 - Assignees: The Regents of the University of California - Applicants: The Regents of the University of California - Inventors: Scott S. Hsieh - Web page: https://patentgrep.com/patent/US12000970B2 ## CPC - G01T 1/171: {Compensation of dead-time counting losses} - G01T 1/172: with coincidence circuit arrangements (G01T1/178 takes precedence {; combination of detectors, see G01T1/1603, G01T1/30}) - A61B 6/4241: {using energy resolving detectors, e.g. photon counting} - G01T 1/36: Measuring spectral distribution of X-rays or of nuclear radiation {spectrometry (pulse selection circuits per se H03K; investigation of materials by radiation diffraction G01N23/20; spectrometer tubes H01J49/00)} - 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) ## Abstract A system for charge sharing compensation for a photon counting detector. A plurality of comparators, each configured to generate comparator output data based on a threshold value, a plurality of energy bins, each of the plurality of energy bins coupled to one of the plurality of comparators, and a coincidence logic coupled to two or more of the plurality of comparators and configured to receive comparator output data associated with two or more of a plurality of pixels. The comparator output data for each pixel indicates when a signal associated with the pixel crosses a threshold value. The coincidence logic is configured to generate a coincidence output when the comparator output data for a first pixel is received within a predetermined time interval of the comparator output data for a second pixel. The system includes a coincidence counting bin coupled to the coincidence logic and configured to receive the coincidence output and generate count data based on the coincidence output. ## Claims ### Claim 1 A system for charge sharing compensation for a photon counting detector comprising: a plurality of comparators, each of the plurality of comparators configured to generate comparator output data based on a threshold value; a plurality of energy bins, each of the plurality of energy bins coupled to one of the plurality of comparators; a coincidence logic coupled to two or more of the plurality of comparators and configured to receive comparator output data associated with two or more of a plurality of pixels, the comparator output data for each pixel indicating when a signal associated with the pixel crosses a threshold value, the coincidence logic configured to generate a coincidence output when the comparator output data for a first pixel is received within a predetermined time interval of the comparator output data for a second pixel; and a coincidence counting bin coupled to the coincidence logic and configured to receive the coincidence output and generate count data indicating a number of detected coincidences between pixels based on the coincidence output. ### Claim 2 (depends on 1) The system according to claim 1, further comprising an estimator coupled to the coincidence counting bin and the plurality of energy bins and configured to generate an image based on the count data from the coincidence counting bin and data from each of the plurality of energy bins. ### Claim 3 (depends on 2) The system according to claim 2, further comprising a display coupled to the estimator and configured to display the image. ### Claim 4 (depends on 1) The system according to claim 1, wherein the plurality of pixels is a plurality of adjacent pixels. ### Claim 5 (depends on 1) The system according to claim 1, wherein the first pixel and the second pixel are adjacent pixels. ### Claim 6 (depends on 1) The system according to claim 1, wherein the comparator output data is lowest level discriminator data. ### Claim 7 (depends on 1) The system according to claim 1, wherein the count data is incremented in response to receipt of the coincidence output. ### Claim 8 (depends on 2) The system according to claim 2, wherein the estimator generates a spectral image. ### Claim 9 A method for charge sharing compensation for a photon counting detector comprising: providing comparator output data associated with each of a plurality of pixels from a plurality of comparators to a coincidence logic and a plurality of energy bins, the comparator output data for each pixel indicating when a signal associated with the pixel crosses a threshold value; generating, using the coincidence logic, a coincidence output when the comparator output data for a first pixel is received within a predetermined time interval of the comparator output data for a second pixel; generating count data indicating a number of detected coincidences between pixels based on the coincidence output using a coincidence counting bin; generating an image based on the count data and data from each of a plurality of energy bins; and displaying the image. ### Claim 10 (depends on 9) The method according to claim 9, wherein the plurality of pixels is a plurality of adjacent pixels. ### Claim 11 (depends on 9) The method according to claim 9, wherein the first pixel and the second pixel are adjacent pixels. ### Claim 12 (depends on 9) The method according to claim 9, wherein the comparator output data is lowest level discriminator data. ### Claim 13 (depends on 9) The method according to claim 9, wherein the count data is incremented in response to receipt of the coincidence output. ### Claim 14 (depends on 9) The method according to claim 9, wherein the image is a spectral image.