门脉高压形成时,门静脉系统的血液通过门体静脉吻合的侧支血管回流入体循环,由此形成了多条离肝性的侧支循环通道。在实施手术或介入治疗特别要考虑到这些血管的情况,无意的血管损伤破裂将导致大出血[1]。多排螺旋CT提供了更窄的准直器宽度、更快的扫描速度及更高的时间分辨率, When the portal hypertension is formed, the blood in the portal vein flows back into the body through the collateral vessels which are anastomosed with the portal vein, thereby forming a plurality of collateral circulation channels from the liver. In the implementation of surgery or interventional treatment, especially to consider these vessels, unintentional rupture of vascular injury will lead to major bleeding [1]. Multi-slice spiral CT provides a narrower collimator width, faster scanning speed and higher temporal resolution,