3.0 T MRI在复杂型肛瘘术前诊断中的应用

目的:探讨3.0T MRI在复杂型肛瘘术前诊断中的应用价值。方法:收集21例经手术治疗的复杂型肛瘘患者的临床及影像资料,患者均行MRI平扫及增强扫描,对比手术结果,评价复杂型肛瘘的MRI分级及MRI诊断主管、支管、内口、脓肿的准确性。结果:复杂型瘘管T1WI可见10条或多条状等或稍低信号,T2WI、T2WI抑脂及SPAIR为高信号,增强扫描示瘘管壁明显强化、脓液不强化。MRI诊断与手术所见对照,显示肛瘘内口、外口、主管、支管和脓肿符合率分别为88.00%、100%、97.37%、70.00%和100%。结论:MRI在复杂型肛瘘术前诊断中具有较大的实用价值。

Application of 3.0 T MR on preoperative diagnosis of complex anal fistula

Objective：To analyze the preoperative application value of 3.0 T MRI on complex anal fistula. Methods：To collect clinical and image materials of 21 patients with surgically proved anal fistula. All of cases were plain and enhanced scanned that applying abdominal coil MRI. Then evaluate the diagnostic accuracy of the MR in the grading, main tube, branch tube,internal openings and abscess of anal fistula on the basis of surgical results. Results：Complex fistula showed one or more strips low signal in T1 WI, high signal in T2 WI, T2 WI fat suppression and SPAIR. The fistula tube wall had obvious enhancement, but the fester had not. Compared with the operation results, the coincidence rate of MR which showed internal openings, main tube, branch tube and abscess of anal fistula was 88.00%, 97.37%, 70.00 % and 100.00% respectively. Conclusion： MR has the utility value in the preoperative diagnosis of complex anal fistula.