Patent ID: 7184513
Filing Date: 2007-02-27
Classification: A61B,Y10S

Abstract:
1. A method for producing CT images of an examination object having a periodically moving subregion, comprising: scanning the examination object with the aid of at least one detector; detecting and storing scanned data regarding the moving subregion, usable for determining at least one rest phase; calculating axial tomograms from the detected and stored detector data of at least one rest phase; and assembling, by interpolative mixing, a total examination volume of the examination object in a rest phase section from axially calculated partial volumes so as to reduce step artifacts in a boundary region of the partial volumes; after the assembly of the total examination volume, including a multiplicity of axial original images with pixel values in a zone of the boundary regions of the partial volumes, limiting CT values in at least one image plane z to a prescribed value range with an upper and a lower bound, thus producing a result image D carrying out a pixel-oriented median filtering on the result image D calculating a differential value image F applying a two-dimensional low pass filtering to the differential value image F subtracting the result image G