| 摘要 |
PROBLEM TO BE SOLVED: To measure an element pitch between X-ray detecting elements without depending on optical measurement means.SOLUTION: An X-ray CT apparatus M includes: a sinogram reading part 71 for reading a sinogram based on projection data acquired by attenuation-body scan imaging; a density profile generating part 72 for generating a density profile in which density values of the attenuation body for every prescribed view are plotted with respect to channels; a representative channel calculating part 73 for calculating a representative channel where a representative point of the respective density profile is located; and a distance calculating part 75 for calculating the element pitch in the channel direction based on a variation of the position of the representative channel among views across channels which corresponds to the element pitch and is a measurement target on the density profile, an ideal value of the variation of the position of the representative channel, and a setting value of the element pitch as the measurement target. |
