Patent ID: 7085342
Filing Date: 2006-08-01
Classification: A61B,G06T

Abstract:
1. A method for tracking motion phase of an object comprising: receiving a plurality of projection data indicative of at least a cross-sectional image of the object, the projection data being in dependence upon a detector signal indicative of attenuation of an X-ray beam along a line through the object between an X-ray source and a detector, the projection data being acquired such that the projection data are in dependence upon the attenuation along different lines through the object and in dependence upon the attenuation along same lines through the object at different time instances; processing the projection data for determining motion projection data of the object indicative of motion of the object based on the attenuation along at least a same line through the object at different time instances, the processing comprising: selecting a motion phase of the object from the motion projection data; and, selecting the projection data acquired at time instances within the selected motion phase of the object.