# US 2026/0086047 A1 · Methods for calibrating and applying a flexible x-ray imaging system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0086047 A1 - Document ID: US20260086047A1 - Status: Published application - Kind: A1 - Application number: 19/336,801 - Filed: 2025-09-23 - Published: 2026-03-26 - Earliest claimed: 2024-09-24 - Assignees: Siemens Healthineers AG - Applicants: Siemens Healthineers AG - Inventors: Ludwig RITSCHL - Web page: https://patentgrep.com/patent/US20260086047A1 ## CPC - G01N 23/04: and forming images of the material - G01N 2223/303: calibrating, standardising - G01N 2223/3303: object fixed; source and detector move - G01N 2223/419: computed tomograph - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract A method for calibrated X-ray imaging, with an X-ray imaging system with a radiation emitter with variable pose and an X-ray detector with a variable pose which can be actuated independently of the variable pose of the radiation emitter is described. A calibration and control device and an X-ray imaging system are also described. ## Claims ### Claim 1 A method for calibrated X-ray imaging, with an X-ray imaging system with a radiation emitter with variable pose and an X-ray detector with a variable pose which can be actuated independently of the variable pose of the radiation emitter, the method comprising: performing an initial calibration using an X-ray mapping of an X-ray phantom on the X-ray detector for a plurality of different poses of the radiation emitter and the X-ray detector to ascertain a plurality of initial projections; using the X-ray imaging system to capture X-ray projection data from an examination object for a plurality of different poses of the radiation emitter and the X-ray detector and ascertain optical image data, the optical image data reproducing the plurality of different poses of the X-ray detector relative to the radiation emitter, determining new relative poses; ascertaining corrected projections of the X-ray detector relative to the radiation emitter based on the initial calibration and the new poses from the optical image data; and reconstructing X-ray image data based on the captured X-ray projection data and the corrected projections. ### Claim 2 (depends on 1) The method of claim 1, wherein the performing the initial calibration comprises: capturing initial optical image data from at least one of the radiation emitter or the X-ray detector, ascertaining initial poses of the X-ray detector relative to the radiation emitter based on the initial optical image data, and ascertaining absolute calibrated poses of the radiation emitter and the X-ray detector using the X-ray mapping of the X-ray phantom on the X-ray detector for the plurality of different poses of the radiation emitter and the X-ray detector, the plurality of initial projections being based on the absolute calibrated poses. ### Claim 3 (depends on 2) The method of claim 2, wherein the initial optical image data is captured for at least two poses, rotated relative to each other by a predetermined angle, of the radiation emitter and the X-ray detector. ### Claim 4 (depends on 3) The method of claim 3, wherein the predetermined angle is 90°. ### Claim 5 (depends on 2) The method of claim 2, wherein the initial optical image data and the optical image data are captured using an image recording of a marker arranged on the X-ray detector by an image recording unit arranged on the radiation emitter. ### Claim 6 (depends on 2) The method of claim 2, wherein the initial optical image data and the optical image data are captured using an image recording of a marker arranged on the radiation emitter by an image recording unit arranged on the X-ray detector. ### Claim 7 (depends on 3) The method of claim 3, wherein the ascertaining the corrected projections comprises ascertaining a transformation based on the initial relative poses and the new relative poses and applying the transformation to the initial projections. ### Claim 8 (depends on 1) The method of claim 1, wherein the initial projections and the corrected projections comprise positions of the radiation emitter and the X-ray detector and two vectors which span a plane of a detector surface of the X-ray detector. ### Claim 9 (depends on 3) The method of claim 3, wherein the initial relative poses are ascertained based on intrinsic projection parameters of an image recording unit and the X-ray detector. ### Claim 10 A calibration and control device, comprising: a calibration unit configured to perform an initial calibration using an X-ray mapping of a X-ray phantom on a X-ray detector for a plurality of different poses of a radiation emitter and the X-ray detector to ascertain a plurality of initial projections; a controller configure to control an X-ray imaging system to capture X-ray projection data from an examination object for a plurality of different poses of the radiation emitter and the X-ray detector and ascertain optical image data, the optical image data reproducing the plurality of different poses of the X-ray detector relative to the radiation emitter, determining new relative poses; a correction unit configured to ascertain corrected projections of the X-ray detector relative to the radiation emitter based on the initial calibration and the new poses from the optical image data; and a reconstruction unit configured to reconstruct X-ray image data based on the captured X-ray projection data and the corrected projections. ### Claim 11 (depends on 10) An X-ray imaging system, comprising: a radiation emitter having a variably controllable pose; an X-ray detector having a variably actuated pose independent of the pose of the radiation emitter; and the calibration and control device of claim 10. ### Claim 12 (depends on 11) The X-ray imaging system of claim 11, configured to perform out one of the following types of X-ray image recording: a dynamic scanning method, a Cone Beam Computed Tomography (CBCT) method, a truncated CBCT method, a slot-scan method, a True2Scale method, and a tomosynthesis method. ### Claim 13 (depends on 1) A non-transitory computer program product comprising commands, when executed by a computer, cause the computer to perform the method of claim 1. ### Claim 14 (depends on 1) A non-transitory computer-readable storage medium comprising commands, when executed by a computer, cause the computer to perform the method of claim 1. ### Claim 15 (depends on 3) The method of claim 3, wherein the initial optical image data and the optical image data are captured using an image recording of a marker arranged on the X-ray detector by an image recording unit arranged on the radiation emitter. ### Claim 16 (depends on 3) The method of claim 3, wherein the initial optical image data and the optical image data are captured using an image recording of a marker arranged on the radiation emitter by an image recording unit arranged on the X-ray detector. ### Claim 17 (depends on 3) The method of claim 3, wherein the ascertaining the corrected projections comprises ascertaining a transformation based on the initial relative poses and the new relative poses and applying the transformation to the initial projections. ### Claim 18 (depends on 17) The method of claim 17, wherein the initial projections and the corrected projections comprise positions of the radiation emitter and the X-ray detector and two vectors which span a plane of a detector surface of the X-ray detector. ### Claim 19 (depends on 4) The method of claim 4, wherein the initial relative poses are ascertained based on intrinsic projection parameters of an image recording unit and the X-ray detector.