Patent ID: 8699772
Filing Date: 2014-04-15
Classification: A61B

Abstract:
1. A method for scanning a cyclically movable examination object using a contrast agent within the scope of a preliminary examination by way of a computer tomography (CT) scanner, in which a first image is reconstructable at one of a plurality of discrete recording times from measurement data, from which a time profile of a concentration of the contrast agent is established, the method comprising: synchronizing the plurality of discrete recording times for respectively recording a phase of a cyclical motion with a motion signal from the examination object; scanning the measurement data at each of the plurality of discrete recording times, each of the plurality of discrete recording times being associated with a different cycle; reconstructing a second image, with a time offset with respect to the first image, from the measurement data at each of the plurality of discrete recording times, the time offset being smaller than a time difference between two consecutive recording times; establishing a motion curve, representing a time profile of an intensity of the cyclical motion, by comparing the first image and the second image at each of the plurality of discrete recording times; and scanning the cyclically movable examination object in a subsequent main scan using at least one scanning time corresponding to at least one local minimum determined based on the established motion curve.