目的:直肠癌根治性切除术后局部复发率较高,常规CT检查对于直肠癌Mile’s术后复发的诊断主要依赖于形态学的改变,但是单纯通过形态学鉴别是复发或瘢痕有一定局限性。CT灌注技术是CT功能成像中重要的技术方法之一,它可以从组织细胞水平和微循环水平来揭示人体组织器官的正常生理及病理解剖和病理生理的改变。本文总结分析了螺旋CT灌注成像在直肠癌Mile’s术后的应用和进展。 OBJECTIVE: The local recurrence rate after radical resection of rectal cancer is high. The diagnostic value of routine CT examination for the recurrence of Mile’s rectal cancer mainly depends on the morphological changes. However, the morphological identification of recurrence or scarring has some limitations. CT perfusion technique is one of the most important technical methods in CT imaging. It can reveal the normal physiological and pathological anatomy and pathophysiological changes of human tissues and organs from the level of tissue cells and microcirculation. This article summarizes the application and progress of spiral CT perfusion imaging in postoperative Mile’s surgery.