PROBLEM TO BE SOLVED: To provide a patient positioning system which can accurately perform positioning, even when an area containing a tumor in a patients body is deformed by change in position of the patient or change in time, by reducing its effects on surrounding normal tissue.SOLUTION: A patient positioning method includes: a data acquisition step during the treatment planning period in which patient data during the treatment planning period as data of the patient at the time of treatment planning is acquired a treatment planning step in which a treatment plan is made by using the patient data during the treatment planning period a data acquisition step at the time of treatment in which patient data at the time of treatment as data of the patient at the time of treatment is acquired a shape analysis step in which the shape of the patient during the treatment planning period and the shape of the patient at the time of treatment are compared and analyzed by the patient data during the treatment planning period and the patient data at the time of treatment and a treatment table positioning step in which the shift amount of the treatment table is calculated on the basis of the result of comparison and analysis between the shape of the patient during the treatment planning period and the shape of the patient at the time of treatment in the shape analysis step to shift the treatment table.COPYRIGHT: (C)2012,JPO&INPIT【課題】この発明は、時間や患者の体位の変化により患者体内の腫瘍患部が変形しても、周囲正常組織への影響を低減し、精度良く位置合わせできる患者位置決めシステムを得ることを目的とする。【解決手段】治療計画時の患者のデータである治療計画時患者データを取得する治療計画時データ取得工程と、この治療計画時患者データを用いて治療計画を行う治療計画工程と、治療時の患者のデータである治療時患者データを取得する治療時データ取得工程と、治療計画時患者データと治療時患者データとにより治療計画時の患者の形状と治療時の患者の形状を比較して解析する形状解析工程と、この形状解析工程において治療計画時の患者の形状と治療時の患者の形状を比較して解析した結果を基に治療台の移動量を演算して治療台を移動させる治療台位置決め処理工程とを備えた。【選択図】図1
