| 摘要 |
An X-ray computer tomography apparatus of this invention has a function of monitoring, by a pre-scan, a density of a contrast medium in ROI of an object, stopping the pre-scan on the basis of a timing at which the density reaches to a predetermined value, and starting a main-scan. A main-scan condition is initially set based on a physiological phenomenon of the object measured before the injection of the contrast medium. The necessity of resetting an initially set main scan condition is determined on the change of a physiological phenomenon measured before the end of the pre-scan. If it is determined that the main scan condition needs to be reset, the main scan condition is reset from the initially set main scan condition to a main scan condition corresponding to the physiological phenomenon measured before the end of the pre-scan.
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