Patent ID: 6125164
Filing Date: 2000-09-26
Classification: A61B,A61N

Abstract:
A system for aligning a plurality of radiation therapy beams with a treatment target of a patient, comprising:a) means of conducting a computed tomography (CT) scan;b) means of assembling an intermediate 3-D image from said scan;c) means of acquiring a set of at least two real images of position of said treatment target of said patient relative to a means for generating said radiation therapy beams;d) means of producing a first feature using at least two real images;e) means of generating a set of at least two digitally reconstructed images (DRRs) from said intermediate 3-D image;f) means of producing a second feature vector using at least two digitally reconstructed images;g) means of calculating a difference between said first feature vector and said second feature vector; andh) means of employing an algorithm to adjust position of said means for generating said radiation therapy beams such that said radiation therapy beams are aligned with said treatment target of said patient if said difference does not fall below a minimum allowable value.