高分辨力MRI脂肪抑制T_2WI联合DWI对肛瘘检测效果的评价

Evaluation of high resolution MRI FS-T_2WI combined with DWI in anal fistula

目的 :评价高分辨力MRI脂肪抑制T2WI联合DWI对肛瘘的检测效果。方法 :对63例疑为肛瘘而行高分辨力MRI T2WI联合DWI扫描患者的临床及影像学资料进行分析。结果 :63例中,59例经手术证实为肛瘘。高分辨力MRI脂肪抑制T2WI联合DWI对原发性瘘管的诊断敏感度和特异度分别为98.31%(58/59)、75.00%(3/4),对继发瘘管的诊断敏感度和特异度分别为83.33%(10/12)、98.00%(49/50),对脓肿的敏感度和特异度分别为100.00%(21/21)和97.62%(41/42),对瘘管内口定位及瘘管分级的准确率分别为96.77%(60/62)和98.31%(58/59)。结论:高分辨力MRI脂肪抑制T2WI联合DWI对评价原发性瘘管、继发性瘘管、内口、脓肿及肛瘘分级具有高度准确性,术前MRI检查可为临床治疗方案的选择提供重要依据。

Objective：To evaluate the role of high resolution MRI fat suppression T2 WI（FS-T2 WI） combined with DWI in anal fistula. Methods：Clinical data and image findings of 63 patients with suspected anal fistula undergoing high resolution MRI FS-T2 WI combined with DWI scan were analyzed retrospectively. Results：Among the total of 63 patients,operative findings confirmed anal fistula in 59 patients. The sensitivity and specificity of high resolution MRI FS-T2 WI combined with DWI in detecting primary and secondary tract was found to be 98.31%（58/59）、75.00%（3/4） and 83.33%（10/13）、98.00%（49/50） respectively;for abscess,it was 100.00%（21/21） and 97.62%（41/42）;the correct rate in localization of internal opening was 96.77%（60/62）and grading the tract was 98.31%（58/59）. Conclusions：High resolution MRI FS-T2 WI combined with DWI is highly accurate in assessment of primary tract,secondary tract,abscess and grading the tract. Pre-operative MRI examination can provide important reference value for the choice of clinical treatment plan.