Patent ID: 6055449
Filing Date: 2000-04-25
Classification: A61B

Abstract:
A method for detection and localization of a surgical device in a radiographic image of said surgical device, comprising the steps of:generating a radiographic image, including an image of a surgical device and an anatomical background image;moving said device rotatably through k positions;generating a number k of radiographic images respectively corresponding to said k positions;subtracting each image I.sub.k from at least its two preceding images so as to generate at least two difference images (I.sub.k -I.sub.k-1) and (I.sub.k -I.sub.k-2);deriving the mathematical intersection of all of said difference images; andthereby obtain a resulting image containing only the image of said device on said radiographic image I.sub.k without said anatomical background image.