| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiotherapy equipment, with which a driven multi- division stop is abutted to a mechanical stopper, the position of the multi- division stop stopped by that mechanical stopper is counted and an origin position can be more exactly set in a short time by determining the origin position. SOLUTION: Radiotherapy equipment 1 is provided with a multi-division stop 2 for controlling the dose of X-ray irradiation by forming irradiation fields, multi-division stop controller 3 for controlling the operation of the multi-division stop 2, radiotherapy equipment console 4 for inputting an instruction when the origin position is deviated, detector 5 for detecting the origin position, and storage device 6 for abutting the multi-division stop 2 to the mechanical stopper corresponding to the instruction input, counting the position information of the multi-division stop 2 stopped by that mechanical stopper, newly determining the origin position and storing that newly determined origin position as data.
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