| 摘要 |
PROBLEM TO BE SOLVED: To efficiently collect, when a plurality of examinations are collectively performed by a set of synchronous electrocardiographic imaging in an X-ray CT apparatus, projection data needed for each examination while reducing the exposure to a subject to reconstruct necessary images.SOLUTION: A CT value of image in a region of interest is calculated with time. A half reconstruction is used as a reconstruction method in reconstruction of image from projection data while the calculated CT value does not exceed a prescribed threshold, and a segment reconstruction is used as the reconstruction method while the calculated CT value exceeds the prescribed threshold. |
