Patent ID: 7426256

Claim:
An X-ray imaging method comprising the following steps: forming a set of a plurality of two-dimensional X-Ray projection images of a medical or veterinary object to be examined through a scanning rotation by an X-Ray source and two-dimensional detector, which X-Ray images are acquired at respective predetermined time instants with respect to a functionality process produced by said object; separating an estimated motion of parts of said object into a non-linear temporal component caused by overall contraction within said object, and a linear temporal component caused by overall rotation within said object; reconstructing by back-projection a motion artifacted three-dimensional volume image of said object from the set of two-dimensional X-Ray projection images; deriving a motion correction for the respective two-dimensional images as based on a motion vector field; applying the motion correction to the set of two-dimensional X-ray projection images, generating a set of corrected two-dimensional X-ray projection images; from the set of corrected two-dimensional X-ray projection images, reconstructing a motion corrected three-dimensional volume; wherein said motion correction is derived from reference images that are acquired in corresponding instants of the movement of the object in question that is substantially periodic, and which reference images have substantially differing projection orientations.