Patent ID: 9420975
Filing Date: 2016-08-23
CPC Classification: A61B

Claim Text:
1. An imaging facility comprising: an X-ray source operable to emit a cone beam; an X-ray detector, wherein the X-ray source, the X-ray detector, or the X-ray source and the X-ray detector are positionable such that an isocentric beam emitted by the X-ray source strikes a surface of the X-ray detector at different angles relative to the surface; a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation; a first translation facility configured to move the X-ray source from a first position relative to a portion of the rotation facility in a direction that has a component that is tangential to a circle of rotation around the center of rotation; a second translation facility configured to move the X-ray detector from a second position relative to the portion of the rotation facility, wherein the imaging facility is operable in a first operating mode and a second operating mode, wherein in the first operating mode, image data is recorded while the X-ray source and the X-ray detector are aligned with each other such that a central beam of the X-ray source essentially passes through the center of rotation, and wherein in the second operating mode, image data is recorded when the X-ray source and the X-ray detector are moved by the first translation facility and the second translation facility, respectively, to be aligned with each other such that the central beam emitted by the X-ray source runs laterally past the center of rotation; and a processor unit configured to reconstruct a three-dimensional image from the image data recorded while the X-ray source and the X-ray detector are rotated, wherein the processor is configured to perform a first pre-weighting of the image data recorded in the first operating mode and a second pre-weighting of the image data recorded in the second operating mode, wherein the first pre-weighting is different than the second pre-weighting, wherein the second pre-weighting is based on a shift of the X-ray source relative to the first position by the first translation facility in the second operating mode, wherein the first pre-weighting is based on pixel coordinates relative to a point of contact of the isocentric beam, and wherein the second pre-weighting is based on pixel coordinates relative to a point of impact of a beam striking the surface of the X-ray detector at a substantially perpendicular angle.