| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiotherapy system in which an operator can set an X-ray irradiation range easily and accurately.SOLUTION: A movable X-ray diaphragm 5 includes an X-ray shielding unit composed of a plurality of members, drive means of the X-ray shielding unit, and position detection means for acquiring the position of the X-ray shielding unit. Display means 8 and 9 are provided for displaying a transmission image of a subject based on the output of an X-ray detector 2, and a simulation image in a case where the X-ray shielding unit is projected on the X-ray detector 2 based on the output of the position detection means.SELECTED DRAWING: Figure 1 |
