The objective of the present invention is to reduce the effect of the hysteresis of a scanning electromagnet so as to obtain a particle beam therapy system that realizes high-accuracy beam irradiation. There are included an irradiation management apparatus (32) that controls the scanning electromagnet (3), based on target irradiation position coordinates (Pi) of a charged particle beam (1b), and a position monitor (7) that measures measurement position coordinates (Ps) of the charged particle beam (1b). The irradiation management apparatus (32) has a command value creator (25) that outputs a control input (Io (Ir)) to the scanning electromagnet (3), based on the target irradiation position coordinates (Pi) and correction data (Ia) created on the basis of the measurement position coordinates (Ps), measured by the position monitor (7)in the preliminary irradiation in which the excitation pattern of the scanning electromagnet is the same as that of the main irradiation plan, and the target irradiation position coordinates (Pi).本發明之目的係獲得一種降低掃描電磁鐵的磁滯影響,而實現高精確度的射束照射之粒子射線治療裝置。本發明之粒子射線治療裝置係具有:照射管理裝置32,係依據荷電粒子射束1b的目標照射位置座標Pi來控制掃描電磁鐵3;以及位置監視器7,係測量荷電粒子射束1b的測量位置座標Ps;照射管理裝置32係具有指令值產生器25,該指令值產生器25係依據修正資料Ia與目標照射位置座標Pi對掃描電磁鐵3輸出控制輸入Io(Ir),其中該修正資料Ia係依據在掃描電磁鐵的激磁型樣與正式照射計劃相同之事前照射中位置監視器7所測量的測量位置座標Ps及目標照射位置座標Pi而產生。1a...射入荷電粒子射束1b...射出荷電粒子射束2...射束輸送導管3a...X方向掃描電磁鐵3b...Y方向掃描電磁鐵4...掃描電磁鐵電源5...照射控制裝置7...位置監視器8...位置監視器單元9、13...前置放大器11...線量監視器12...線量監視器單元15...照射對象16...射束擴大裝置17...射束擴大控制裝置18...伸縮軟管19...真空導管20...漣波濾波器21...範圍移位器22...照射控制計算機23...範圍移位器單元32...照射管理裝置50...射束加速輸送控制裝置51...射束產生裝置52...加速器53...射束輸送裝置54...粒子射線照射裝置55...治療計劃裝置56...患者檔案伺服器Bo...加速器設定指令Con...射束供給指令Coff...射束停止指令Do...目標線量Ds...測量線量Io、Ir...指令電流Pi...目標照射位置座標Ps...測量位置座標Si...目標射束尺寸siga...結束信號sigc...觸發信號sigd...線量額滿信號sige...照射結束信號sigh...計數開始信號sigs...切片最後信號So...射束尺寸指令Ss...測量射束尺寸Ro...範圍移位器指令
