Patent ID: 7146033
Filing Date: 2006-12-05
Classification: G01R,G06T

Abstract:
1. A method for determining distortions in an image comprising the steps of: arranging a living subject in an imaging volume of a medical imaging system and obtaining a medical image of said subject in said imaging volume, with a first region of said imaging volume appearing undistorted in said medical image and a second region of said imaging volume appearing distorted in said medical image; prior to obtaining said medical image of said subject, obtaining a single image, using said medical imaging system, of at least three simultaneously-present markings having a known spatial position relative to each other, with a first and a second of said three markings being disposed in said first region and a third of said three markings being disposed in said second region; determining respective positions of said markings in said single image of said markings; determining an ideal position of said third marking in said single image of said markings from the known spatial position of said third marking relative to said first and second markings; and determining a positional difference of the image of the third marking in said single image of said markings from said ideal position, and employing said positional difference as a criterion for distortion in said medical image.