Patent ID: 7020234
Filing Date: 2006-03-28
Classification: A61B,G06T

Abstract:
1. A method for producing tomograms of a periodically moving examination object with periodically recurring cyclic phases, comprising: moving a focus producing a conical beam to scan the examination object, a multirow detector existing opposite the focus on a circular track about the examination object, wherein the examination object is scanned in a sectorwise fashion with individual sectors sweeping at an angle of less than 180°, and wherein the beam is spread out such that the volume of the moving examination object is completely covered by circular scanning without additional lateral movement; measuring, at the same time, movement signals from the moving examination object to determine and store a cyclic phase or a cyclic phase interval, wherein a temporal correlation between the movement data and the detector output data is also stored; reconstructing segment image stacks, independently of one another with the aid of the detector output data stored in a sectorwise fashion, wherein incomplete axial segment images are reformatted therefrom; summing up complete CT tomograms, layerwise angularly complementary and supplementing one another to form 180°, per detector row from the axial and incomplete segment images, wherein detector output data from sectors that were scanned in the determined cyclic phase or in the determined cyclic phase interval are used.