PROBLEM TO BE SOLVED: To reduce burden of an irradiation object by reducing irradiation time while securing a flat and uniform dose distribution on a target.SOLUTION: In a particle beam irradiation system 20, an irradiation object 6 is irradiated with a charged particle beam 2 emitted from an accelerator 22 by means of an irradiation apparatus 30. An irradiation parameter of the particle beam irradiation system is determined by an irradiation planning method. The irradiation planning method is employed to estimate irradiation error due to the particle beam irradiation system and to determine an irradiation parameter by considering the estimated irradiation error.COPYRIGHT: (C)2008,JPO&INPIT【課題】ターゲットでの平坦で一様な線量分布を保障しつつ、照射時間を短縮し、照射対象の負担を軽減できるようにする。【解決手段】加速器22から出射した荷電粒子ビーム2を照射装置30により照射対象6に照射する粒子線照射システム20の照射パラメータを決定する照射計画方法において、前記粒子線照射システムに起因する照射誤差を推定し、該推定した照射誤差も加味して照射パラメータを決定する。【選択図】図1
