目的 探讨MRI在直肠癌患者诊 断及疗效评估中的应用价值。方法 选 取2014年6月-2015年10月于我院就诊 的60例直肠癌患者为研究对象,均予以 术前MRI和手术病理检查。以病理检查 为“金标准”，评估术前MRI对直肠癌 T分期、直肠癌系膜淋巴结分期的诊断 准确性。结果 MRI对直肠癌T分期诊断 准确率为83.3%(50/60)，其中T1期为 78.6%(11/14)，T2期为85.0%(17/20)， T3期为77.8%(14/18)，T4期为 100.0%(8/8)；对直肠癌系膜淋巴结分期 诊断准确率为73.3%(44/60)，其中N1期为 79.2%(19/24)，N2期为68.4%(13/19)，T3 期为70.6%(12/17)。结论 MRI在直肠癌的 临床诊断及术前分期中具有较高的应用价 值，可将其作为术前诊断及术后降期评估 的有效依据用于诊疗工作中。

Objective To evaluate the application value of MRI in the diagnosis of patients with rectal cancer evaluation of curative effect. Methods 60 cases of patients with rectal cancer treated in our hospital between June 2014 and October 2015 were selected as the study subjects. All patients were given preoperative MRI and pathological examination. With pathological examination as the golden standard, the accuracy rates of preoperative MRI in the diagnosis of T staging of rectal cancer and T staging of rectal cancer mesentery lymph nodes were evaluated. Results Theaccuracy rate of MRI in the diagnosis of T staging of rectal cancer was 83.3%(50/60), of T1 stage was 78.6%(11/14), of T2 stage was 85.0%(17/20), of T3 stage was 77.8%(14/18), and of T4 stage was 100.0%(8/8), The accuracy rate in the diagnosis of staging of rectal cancer mesentery lymph nodeswas 73.3%(44/60), of N1 stage was 79.2%(19/24), of N2 stage was 68.4%(13/19), and of T3 stage was 70.6%(12/17). Conclusion MRI is of high application value in the clinical diagnosis and preoperative staging of rectal cancer. It can be used as an effective basis for preoperative diagnosis and postoperative evaluation.