To provide an intravascular visualization method capable of securing a large visual field in the depth direction by resolving a scattered position and a reflected position in an optical axis direction even under the presence of a blood flow. 血流の存在下でも光軸方向に散乱位置・反射位置が分解でき、奥行き方向の視野を大きく確保できる血管内の可視化方法を提供する。 - 特許庁