present shape data generation method, the object of the tomographic images, a generating process of generating the data of the target shape is the shape of the deformation target, a standard shape and are and the deformation target shape of an object target of the vertices of the shape, along with the normal of the said vertices to identify the first vertex having a portion and a point of intersection which corresponds to the boundary between the object and the object with no parts in the tomographic image of the target shape, a first apex of the deformation processing in which the deformation and the setting processing for setting the internally dividing point between the intersection to the second vertex, the object shape to overlap the first vertex to the second vertex, setting the shape after deformation in the object shape the setting process and deforming process to include a process of a predetermined number of executions.本形状データ生成方法は、物体の断層画像から、変形目標の形状である目標形状のデータを生成する生成処理と、物体の標準的な形状であり且つ変形対象となる形状である対象形状の頂点のうち、当該頂点についての法線が目標形状のうち断層画像において物体と物体ではない部分との境界に該当する部分と交点を有する第1の頂点を特定すると共に、第1の頂点と交点との内分点を第2の頂点に設定する設定処理と、第1の頂点を第2の頂点に重ねるように対象形状を変形し、変形後の形状を対象形状に設定する変形処理と設定処理及び変形処理を所定回数実行する処理とを含む。
