Not prescribing the blood vessel contrast medium, producing the x-ray, to acquire the not yet dosage picture of blood vessel contrast medium not yet dosage state with not yet dosage picture acquisition expedient 7, after prescribing the blood vessel contrast medium, producing the x-ray, you acquire the dosage picture of blood vessel contrast medium dosage state with dosage picture acquisition expedient 8. It superposes with the not yet dosage picture and the dosage picture which are acquired with blood vessel locus picture acquisition expedient, 9 the not yet dosage state of the blood vessel contrast medium and the graphics data of the DSA picture which is obtained with dosage state each one it processes, acquires the blood vessel locus picture. The black and white it reverses the blood vessel locus picture which is obtained with image processing expedient, 10 indicates the blood vessel white. While inserting beam hardening filter 4, inserting guide wire W into the blood vessel it does x-ray perspective photographing. It superposes with that x-ray perspective image and the blood vessel locus picture with picture superposition expedient, 11 it indicates the superposition picture which is acquired in indicatory monitor 15.血管造影剤を投与しないでX線を照射して、未投与画像取得手段7で血管造影剤未投与状態の未投与画像を取得し、血管造影剤を投与してからX線を照射して、投与画像取得手段8で血管造影剤投与状態の投与画像を取得する。取得された未投与画像と投与画像とを血管軌跡画像取得手段9で重ね合わせ、血管造影剤の未投与状態と投与状態それぞれで得られたDSA画像の画像データを処理し、血管軌跡画像を取得する。得られた血管軌跡画像を画像処理手段10で白黒反転させ、血管を白く表示させる。ビームハードニングフィルタ4を挿入し、ガイドワイヤWを血管内に挿入しながらX線透視撮影を行う。そのX線透視像と血管軌跡画像とを画像重ね合わせ手段11で重ね合わせ、取得した重ね合わせ画像を表示モニタ15に表示する。
