| 摘要 |
PROBLEM TO BE SOLVED: To provide a dose distribution measuring instrument constituted so as to measure the dose distribution of corpuscular beam treatment equipment having a rotary gantry, miniaturizing a water tank while ensuring a necessary measuring range to reduce a strength condition imposed on a drive device and the water tank and capable of measuring OCR, TPR and PDD even in a corpuscular beam radiation apparatus having the rotary gantry. SOLUTION: The dose distribution measuring instrument is constituted so that a cylindrical hermetically closed water tank having a radius set to a minimum range necessary for measurement is attached to a drive bed having three drive shafts and the sensor in the hermetically closed water tank is attached to a drive shaft movable only in an up and down direction to miniaturize the water tank and can measure OCR, TPR and PDD even in the corpuscular beam apparatus having the rotary gantry.
|
