In the present invention, the blood vessel cross-sectional shape digitizing apparatus 10 digitizes the shape of the intima 120 of the blood vessel in the cross-sectional shape of the blood vessel after the stent S is inserted into the lumen 110 of the blood vessel. The blood vessel cross-sectional shape digitizing apparatus 10 calculates a plurality of coordinates on the boundary between the intima 120 of the blood vessel and the lumen 110 in the image representing the cross-sectional shape of the blood vessel in a state where the blood cell component is not substantially present inside. Shape digitizing means for digitizing the shape of the intima 120 based on a plurality of coordinates obtained by the coordinate obtaining means to obtain. According to the present invention, a blood vessel cross-sectional shape digitizing device and a blood vessel cross-sectional shape digitizing method using the same for quantifying the shape of the blood vessel intima in the cross-sectional shape of the blood vessel after the stent is inserted into the lumen of the blood vessel Can be provided.本発明は、血管断面形状数値化装置１０は、ステントＳを血管の内腔１１０に挿入した後の血管の断面形状において、血管の内膜１２０の形状を数値化する。血管断面形状数値化装置１０は、血球成分が内部に実質的に存在しない状態の血管の断面形状を表す画像における、血管の内膜１２０と内腔１１０との間の境界上の複数の座標を取得する座標取得手段よって取得された複数の座標に基づいて、内膜１２０の形状を数値化する形状数値化手段と、を備える。本発明によれば、ステントを血管の内腔に挿入した後の血管の断面形状において、血管の内膜の形状を数値化する血管断面形状数値化装置及びそれを用いた血管断面形状数値化方法を提供することができる。
