| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation CT apparatus capable of shortening the whole reconfiguration calculation time while generating a tomogram image having a high resolution of the angular range by performing the reconfiguration calculation having a large number of views only in a specific projection angular range after CT photography.SOLUTION: Radiation projection data is stored while the number of views is set large during its collection, and a rough outline tomogram image is generated using a part of the data. The projection angular range and the number of views are specified on the outline tomogram image. The reconfiguration calculation is performed on the basis of the specified number of views in the specified projection angular range, and at the same time, the reconfiguration calculation is performed using projection data having a smaller number of views in the range other than the specified projection angular range. A tomogram image having a high resolution is generated only in the specified projection angular range. |
