Patent ID: 7769129
Filing Date: 2010-08-03
Classification: A61B

Abstract:
1. An X-ray computed tomography apparatus characterized by comprising: an X-ray tube which generates X-rays; a multi-channel X-ray detector which detects X-rays transmitted through an object to be examined; a rotating frame which is equipped with the X-ray tube and the X-ray detector; a reconstruction unit which reconstructs an image on the basis of an output from the X-ray detector; and a control unit which alternately shifts an X-ray focal spot of the X-ray tube along a rotating direction on an anode by a distance +σ and a distance −σ for each view, wherein the distance σ is set to where SOD is a distance between the X-ray tube and a rotation center, and Δβ is an angle difference between adjacent views seen from the rotation center, such that X-ray focal spots in the adjacent views overlap each other at substantially the same position.