Patent ID: 11875429
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC G  A | IPC A  G

Claim 0:
1. An apparatus for tomographic X-Ray image reconstruction, the apparatus comprising:
input circuitry configured to:
acquire, from an input projection image sequence, first 2D X-Ray projection data and second 2D X-Ray projection data of a region of interest of an object acquired, respectively, at first and second acquisition times, and
provide (i) first 3D rigid object data of, or approximating, a first rigid object in a region of interest of a patient, and (ii) second 3D rigid object data of, or approximating, a second rigid object in a region of interest of the patient; and

a processor configured to:
generate a first registration of at least one of the first 3D rigid object data and the second 3D rigid object data to the first 2D X-Ray projection data,
generate a second registration of at least one of the first 3D rigid object data and the second 3D rigid object data to the second 2D X-Ray projection data,
estimate a relative motion of the second rigid object relative to the first rigid object occurring between the first and second acquisition times,
provide a relative motion vector field defining the relative estimated motion of the second rigid object relative to the first rigid object based on the first registration and the second registration,
generate corrected 2D X-Ray projection data using the relative motion vector field to correct for the relative motion of the second rigid object relative to the first rigid object during acquisition of the input projection image sequence, and
generate motion-compensated 3D reconstruction data of the input projection image sequence based on the corrected 2D X-Ray projection data.