Patent ID: 9630024
Date: 2017-04-25
CPC Classifications: A61N

Claim:
1. A radiation treatment planning system for preparing treatment planning information for carrying out radiation treatment, the radiation treatment planning system comprising: an input unit with which an operator inputs a prescription dose and an irradiation angle; an arithmetic unit which prepares the treatment planning information by determining irradiation conditions in such a manner as to bring a dose distribution calculated based on the inputs from the input unit closer to the prescription dose; and a display unit which displays the treatment planning information, wherein the arithmetic unit sets, per radiation irradiation point of the radiation treatment, an index representing a degree of demand for irradiation amount suppression, the degree of demand determined by the radiation irradiation point, and the arithmetic unit further determines the irradiation conditions using the index according to the following expression: where “p” is a target dose set for “m” points corresponding to a target region, “w where “l” is a permissible dose set for “n” points corresponding to an organ at risk, “w where “K