Patent ID: 6909769

Claim:
A method for three-dimensional imaging of a moving examination subject comprising the steps of: injecting a contrast agent into a subject, said contrast agent having a dwell time in an examination region of said subject exhibiting substantially periodic movement; mounting an x-ray source, which emits an x-ray fan beam having a fan angle, and a radiation detector on a C-arm, which exhibits mechanical instability at high rotational speeds, and rotating said C-arm and said x-ray source and said radiation detector around said examination region at least once through 180° plus said fan angle during said dwell time at a high speed for obtaining data during said dwell time representing a sufficient number of two-dimensional projections of said examination region to allow reconstruction of a three-dimensional image that is substantially free of artifacts due to said movement, said x-ray source and said radiation detector, due to said mechanical instability at said high speed, having respectively different geometric relations in different projections; recording anew the geometric relations of said x-ray source, said radiation detector and said subject for each of said projections as each of said projections is obtained; and reconstructing said three-dimensional image from said data and making said three-dimensional image free of said artifacts by using said recorded geometric relations.