Patent ID: 7583778
Filing Date: 2009-09-01
Classification: A61B,G06T

Abstract:
1. An X-ray CT apparatus comprising: an X-ray source for irradiating an X-ray; an X-ray detector arranged with a plurality of X-ray detector elements and for detecting the X-ray; a rotating unit configured to rotate the X-ray source and the X-ray detector around a subject such that an X-ray path closest to a rotation center of upon rotation of the X-ray source and the X-ray detector is in a position deviated by a first value α a collecting unit configured to cause the X-ray detector to collect the X-ray irradiated from the X-ray source; a setting unit configured to set a second value γ a storing unit configured to store the second value γ a reconstructuring unit configured to perform a backprojection operation on the projection data and to reconstruct the image, wherein the reconstructing unit is configured to upon the backprojection operation, backproject the projection data at least in a vicinity of the rotation center to a position deviated by the second value γ