PROBLEM TO BE SOLVED: To provide a technique capable of improving accuracy in various radiation treatment plans.SOLUTION: An information processing device includes: a simulation information acquisition unit for acquiring an average absorbed dose in an evaluation area included in an object to be obtained by simulating an action in the object of a radiation on which an irradiation condition is designated a distribution acquisition unit for acquiring the probability density distribution of an absorbed dose with respect to an average absorbed dose in each cell or cell nucleus assumed to be included in the evaluation area and an equivalent dose acquisition unit for acquiring an equivalent dose in an evaluation area, based on the probability density distribution of an absorbed dose with respect to an average absorbed dose in each of the cells or the cell nuclei and the average absorbed dose.COPYRIGHT: (C)2014,JPO&INPIT【課題】様々な放射線治療計画の精度を向上させることを可能にする技術を提供する。【解決手段】本発明の一側面に係る情報処理装置は、照射条件が指定された放射線の対象物内での挙動をシミュレーションすることで得られる前記対象物に含まれる評価領域における平均吸収線量を取得するシミュレーション情報取得部と、前記評価領域に含まれると仮定される各細胞又は細胞核における吸収線量の前記平均吸収線量に対する確率密度分布を取得する分布取得部と、前記各細胞又は細胞核における吸収線量の前記平均吸収線量に対する前記確率密度分布と前記平均吸収線量とに基づいて、前記評価領域における等価線量を取得する等価線量取得部と、を備える。【選択図】図2
