Patent ID: 9724053
Date: 2017-08-08
CPC Classifications: A61B,G21K

Claim:
1. An X-ray CT apparatus, comprising: a wedge configured to adjust a distribution of dose of an X ray emitted from an X-ray source; a shield added to the wedge; a wedge driving unit moving the wedge in a slice thickness direction; and a system control unit controlling the wedge driving unit to move the wedge during a scan execution period, wherein the system control unit controls the wedge driving unit to move the wedge to a first position where an X ray, spreading in the slice thickness direction of the X-ray source and unnecessary for reconstruction of an image for medical use, is blocked by the shield in a non-reconstruction range at the start of the scan execution period, or controls the wedge driving unit to move the wedge to a second position where the X ray unnecessary for reconstruction of the image for medical use is blocked by the shield in the non-reconstruction range at the end of the scan.