目的探讨1.5T MRI对肛瘘的 诊断准确性及价值。方法 分析我院于 2013.1至2018.5 32例经MRI诊断，并经手 术、病理诊断的临床资料。结果 32例肛 瘘患者，其中瘘管为42个，内口46个，外 口42个，瘘管呈条状，T1WI呈等或低信 号，T2WI-fs呈高信号，DWI呈高信号。其 中3例增强强化。MRI对瘘管、内口及外 口显示的敏感度分别是88.1%，89.1%， 92.9%。1.5T MRI诊断结果与病理无统计 学差异(P>0.05)。结论 MRI对瘘管、内口 及外口有较好的显示，对手术有指导意 义。

Objective To investigate the diagnostic accuracy and value of 1.5T MRI multiple sequence anal fistula. Methods The clinical data of 32 cases diagnosed by MRI from 2013.1 to 2018.5 were analyzed. Results Among 32 cases of anal fistula, 42 were fistulas, 46 were internal canals, 42 were external canals, and fistulas were strips. The T1WI showed equal or low signal, T2WI-fs showed high signal, and DWI showed high signal. Among them, 3 cases were enhanced. The MRI sensitivity of the fistula, internal and external ports was 88.1%, 89.1%, and 92.9%, respectively. There was no statistical difference between the 1.5T MRI diagnosis and pathology (P>0.05). Conclusion MRI has a good indication of the fistula, the internal orifice and the external orifice, and has guiding significance for the operation.