The cancer depth diagnosis system includes an endoscope, a micro tomographic probe that is introduced into the body together with the endoscope, emits low coherence light to the target tissue where the target tumor is located, and acquires an optical interference signal, and optical interference A tomogram of the target tissue including the target tumor based on the signal and a determination unit that acquires blood flow velocity information in a blood vessel in the tomogram, and the determination unit is configured to acquire the target tumor based on the tomogram and blood flow rate information. Determine the depth of penetration.癌深達度診断システムは、内視鏡と、内視鏡と共に体内に導入され、対象腫瘍が位置する対象組織に低コヒーレンス光を出射して光干渉信号を取得するマイクロ断層プローブと、光干渉信号に基づいて対象腫瘍を含む対象組織の断層像および断層像内の血管における血流速情報を取得する判定部とを備え、判定部は、断層像および血流速情報に基づいて対象腫瘍の深達度を判定する。
