目的 探析多层螺旋CT在直肠癌 临床诊断中的应用价值。方法 选择我院 消化科、肛肠外科2011年5月-2015年11月 所收治直肠癌患者54例进行回顾性分析， 均应用飞利浦Brilliance CT 64 Slice 进行检查，明确患者T分期、N分期及M分 期结果并与术后病理结果进行对照。结 果 直肠癌的螺旋CT主要表现为局限性软 组织密度肿块，直肠-乙状结肠壁增厚(呈 环形或半环形)，向腔内突出生长，密度 均匀，肿瘤体积大时可见低密度缺血坏 死区。注射造影剂后肿块CT值升高30%左 右。以病理结果为基准，16层螺旋CT的T 分期诊断符合率为88.9%(48/54)，N分期 诊断符合率为66.7%(36/54)，M分期诊断 符合率为96.3%(52/54)。结论 多层螺旋 CT在直肠癌术前诊断及分期中为应用具有 较高的T分期及M分期诊断符合率，可对患 者肿瘤病变情况及病灶结构进行良好显 示，为直肠癌的可靠检查手段，利于患者 临床治疗方案的制定。

Objective To explore the application value of multi-slice spiral CT in the clinical diagnosis of rectal cancer. Methods 54 cases of patients with rectal cancer who were admitted into our hospital between May 2011 and November 2015 were retrospectively analyzed. All patients were examined by Philips CT. The results of T stage, N stage and M stage were determined and compared with the postoperative pathological results. Results The main spiral CT findings of rectal cancer were localized soft tissue mass, rectum - sigmoid colon wall thickening (circular or semi-circular), exserted growth into the cavity, with homogeneous density and low-density ischemic necrosis area when tumor was large. After injection of contrast agent, CT value increased by about 30%. Based on pathological results, the diagnostic accuracy of 16 slice spiral CT in T stage, N stage and M stage were 88.9% (48/54), 66.7% (36/54) and 96.3% (52/54) respectively. Conclusion Multi-slice spiral CT has relatively higher coincidence rate in the diagnosis of rectal cancer in T stage and M stage. It can well display tumor lesions and the structure of lesions. It is a reliable examination method of rectal cancer, and is conducive to the development of clinical treatment regimen for patients.