| 摘要 |
PROBLEM TO BE SOLVED: To surely correct the projection data of high resolution free from the distortion by excluding the influence of the displacement of the effective pass caused by the lag of the correction timing of the projection data while keeping the practical circuit scale of a data acquisition system(DAS) without specially elongating a scanning time when the scanning is executed by a cone beam by using the continuous X-ray. SOLUTION: An X-ray CT scanner comprises an X-ray tube for continuously exposing the X-ray, and a two-dimensional detector 11. The X-ray is formed into the cone beam. A data acquisition system(DAS) 24 correcting the intensity of transmitted X-ray detected by the detector 11 as the projection data, is mounted. The DAS 24 reads the projection data of one of the sequence direction and the channel direction with priority. A reconfiguration unit determines the vertual effective focal spot position of the X-ray tube by the X-ray effective pass relative to the collection of a plurality of X-ray detecting elements, to reconfigurate the image data on the basis of the projection data and the vertual effective focal spot position.
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