目 的 探讨多层螺旋CT扫描 (MSCT)与MRI在鉴别结直肠癌术前T、N 分期的诊断价值。方法 选取2016年2 月-2017年10月本院收治的60例结直肠癌 患者为研究对象，均于术前1周行MSCT、 MRI扫描检查，以术后病理分期结果为金 标准，评估MSCT与MRI在鉴别结直肠癌术 前T、N分期的诊断价值。结果 以术后病 理分期结果为金标准，MRI诊断结直肠癌 患者术前T、N分期的符合率较MSCT的明显 高，差异有统计学意义(P＜0.05)；典型 病例图像分析结果提示MSCT和MRI在结直 肠癌患者术前分期诊断中均有明确应用价 值。结论 MRI在鉴别结直肠癌术前T、N分 期的诊断中与术后病理分期结果的符合率 较MSCT明显高，前者在结直肠癌患者术前 T、N分期诊断中的应用价值更高。

Objective To investigate the diagnostic value of multi-slice spiral CT scan (MSCT) and MRI in differentiating preoperative T and N stages of colorectal cancer. Methods Sixty patients with colorectal cancer who were treated in the hospital from February 2016 to October 2017 were selected. All patients underwent MSCT and MRI scans at 1 week before surgery. With postoperative pathological stages results as the golden standard, the diagnostic value of MSCT and MRI in differentiating preoperative T and N stages of colorectal cancer was evaluated. Results With postoperative pathological stages results as the golden standard, the coincidence rates of preoperative T and N stages diagnosed by MRI in patients with colorectal cancer were significantly higher than those by MSCT (P<0.05). The image analysis results of typical cases showed that both MSCT and MRI were of application value in the preoperative stages of colorectal cancer. Conclusion The coincidence rates of MRI in the diagnosis of preoperative T and N stages of colorectal cancer are significantly higher than those of MSCT. The former is of greater application value in the diagnosis of preoperative T and N stages of colorectal cancer.