Patent ID: 7145984

Claim:
An X-ray CT system for performing a scan so as to irradiate X-rays, which are generated from an X-ray tube, to a subject from a plurality of directions, and for reconstructing tomographic images of the subject, comprising: a sampling device for sampling information on a first set of exposures said subject has received during a scan performed for constructing tomographic images, which is appended to each of the reconstructed tomographic images, on the basis of identification information with which said subject is identified; a creating device for creating an exposure distribution of the exposures, which are calculated relative to an axis orthogonal to the scanning directions, on the basis of the sampled information on the exposures, wherein the axis includes a first position and a second position, wherein the exposures include a first exposure of the subject to x-rays and a second exposure of the subject to x-rays, and wherein the first exposure is calculated at the first position and the second exposure is calculated at the second position; and a display device on which said exposure distribution is displayed.