# US 10,765,387 B2 · Position adjustment device for flat panel detector, position adjustment method for flat panel detector, and radiotherapy apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,765,387 B2 - Document ID: US10765387B2 - Status: Granted - Kind: B2 - Application number: 16/232,240 - Filed: 2018-12-26 - Published: 2019-06-27 - Granted: 2020-09-08 - Earliest claimed: 2017-12-27 - Assignees: Toshiba Energy Systems & Solutions Corporation; Toshiba Plant Systems & Services Corporation - Applicants: Toshiba Energy Systems & Solutions Corporation; Toshiba Plant Systems & Services Corporation - Inventors: Takayuki Kobayashi; Hiromasa Itoh; Shigeru Kasai - Web page: https://patentgrep.com/patent/US10765387B2 ## CPC - A61B 6/4452: {the source unit and the detector unit being able to move relative to each other} - A61B 6/4233: {using matrix detectors} - A61B 6/4283: {characterised by a detector unit being housed in a cassette} - A61B 6/587: {Alignment of source unit to detector unit} - A61N 5/10: X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy (A61N5/01 takes precedence) - A61N 5/1049: {for verifying the position of the patient with respect to the radiation beam} - 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}) - A61N 2005/1061: {using an x-ray imaging system having a separate imaging source} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - 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) ## Abstract A position adjustment device for a flat panel detector comprising: a guide that is provided on a surface side of the flat panel detector and can be measured by an optical device; and a fixing member configured to fix the guide to one of a side of the flat panel detector of a position adjustment unit and a side of a support portion for supporting the flat panel detector, the position adjustment unit being provided between the flat panel detector and the support portion. ## Claims ### Claim 1 A position adjustment device for a flat panel detector comprising: a guide that is provided on a surface side of the flat panel detector and can be measured by an optical device; and a fixing member configured to fix the guide to one of a side of the flat panel detector of a position adjustment unit and a side of a support portion for supporting the flat panel detector, the position adjustment unit being provided between the flat panel detector and the support portion, wherein the position adjustment unit is configured to include a first member fixed to the flat panel detector, a second member fixed to the support portion, and an operation unit for adjusting a distance between the first member and the second member, the fixing member is configured to fix the guide to one of the first member and the second member, and the operation unit is configured to match a position corresponding to the isocenter with a position that is an image center of the flat panel detector, by adjusting the distance between the first member and the second member. ### Claim 2 (depends on 1) The position adjustment device for a flat panel detector according to claim 1, wherein the guide is close to a surface of the flat panel detector. ### Claim 3 (depends on 1) The position adjustment device for a flat panel detector according to claim 1, wherein the guide is formed in such a straight line that two axes of two-dimensional coordinates corresponding to a surface of the flat panel detector can be measured by the optical device. ### Claim 4 (depends on 1) The position adjustment device for a flat panel detector according to claim 1, wherein the guide includes plural markers that can measure two axes of two-dimensional coordinates corresponding to a surface of the flat panel detector by using the optical device. ### Claim 5 (depends on 1) The position adjustment device for a flat panel detector according to claim 1, wherein the guide includes plural markers that are provided at a periphery of the flat panel detector and are depicted in an X-ray image. ### Claim 6 (depends on 1) The position adjustment device for a flat panel detector according to claim 1, wherein the guide includes a first marker depicted in an X-ray image and a second marker, position of which can be measured by the optical device. ### Claim 7 (depends on 1) The position adjustment device for a flat panel detector according to claim 1, wherein the guide includes a wire. ### Claim 8 (depends on 1) The position adjustment device for a flat panel detector according to claim 1, wherein the guide is fixed to the flat panel detector. ### Claim 9 (depends on 1) The position adjustment device for a flat panel detector according to claim 1, wherein the guide is fixed to the support portion. ### Claim 10 A position adjustment method for a flat panel detector comprising: providing a guide on a surface side of the flat panel detector, the guide being depicted in an X-ray image and being positionally measurable by an optical device; fixing the guide to one of a side of the flat panel detector of a position adjustment unit and a side of a support portion for supporting the flat panel detector, the position adjustment unit being provided between the flat panel detector and the support portion, specifying a first difference between a first position corresponding to an isocenter and a second position indicated by the guide by using the optical device; specifying a second difference between the second position and the third position, which is an image center of the flat panel detector, by using the X-ray image; specifying a third difference between the first position and the third position, depending on the first difference and the second difference; and operating the position adjustment unit according to the third difference in such a manner that the third position matches the first position. ### Claim 11 (depends on 1) A radiotherapy apparatus comprising: the position adjustment device for a flat panel detector according to claim 1; an X-ray imaging apparatus configured to generate an X-ray image of an object by irradiating the flat panel detector with X-rays; and a radiation irradiation apparatus configured to irradiate the object with therapeutic radioactive rays.