摘要目的探讨MR无创性评估直肠癌周围直肠系膜内肉眼可见血管及微小血管的侵犯情况的应用价值。方法13例直肠癌病人术前均使用1.5 T MR设备行动态对比增强扫描(DCE-MRI)。利用MR血管减影技术得到血管后处理影像,由2位医生独立观察评价直肠系膜内肉眼可见血管 Abstract Objective To investigate the value of noninvasive invasive MR imaging in assessing the macroscopic and microvascular invasion in the mesorectum of rectum. Methods Thirteen patients with rectal cancer underwent dynamic Contrast Enhanced Imaging (DCE-MRI) using a 1.5 T MR device. Vascular angiography was used to obtain post-operative images of the vessels, and two physicians independently observed and evaluated the visible blood vessels in the mesorectum