目的探讨分析磁共振成像不同 扫描序列在诊断肛瘘的价值。方法 回顾 性分析我院收治的术后证实为肛瘘30例 患者资料，术前均行MRI检查，扫描序 列：FSE T1WI平扫以及增强扫描，脂肪 抑制快速恢复快速自旋回波序列(T2 fs FRFSE)以及三维容积内插快速扰相梯度回 波平扫及增强扫描(3D-FSPGR)，分析比 较3种序列检查诊断价值。结果 30例患 者共发现43个肛瘘外瘘口，T2 fs FRFSE 准确显示肛瘘外瘘口18个(41.86%)、 FSE T1W增强准确显示肛瘘外瘘口25个 (58.14%)、3D-FSPGR准确显示肛瘘外瘘 口40个(93.02%)，其中3D-FSPGR对肛瘘 外瘘口显示准确率显著高于T2 fs FRFSE 与FSE T1WI增强(P<0.05)。T2 fs FRFSE 准确显示肛瘘内瘘口10个(35.71%)、 FSE T1W增强准确显示肛瘘内瘘口14个 (50.00%)、3D-FSPGR准确显示肛瘘内瘘 口23个(82.14%)，其中3D-FSPGR对肛瘘 内瘘口显示准确率显著高于T2 fs FRFSE 与FSE T1WI增强(P<0.05)。T2 fs FRFSE 准确显示肛瘘瘘管分支29个(56.86%)、 FSE T1W增强准确显示肛瘘瘘管分支34个 (66.66%)、3D-FSPGR准确显示肛瘘瘘管分 支45个(88.23%)，其中3D-FSPGR对肛瘘瘘 管分支显示准确率显著高于T2 fs FRFSE 与FSE T1WI增强(P<0.05)。结论 3DFSPGR序列是术前诊断肛瘘的敏感方法， 能够提高肛瘘内、外瘘口以及肛瘘瘘管的 显示率，同时联合其他扫描序列，能够获 得更为明确的术前诊断结果。

Objective The clinical value of different scanning sequence of magnetic resonance imaging (MRI) in the diagnosis of anal fistula was analyzed. Methods A retrospective analysis of our hospital after surgery confirmed 30 cases of anal fistula patients, the patients were examined by MRI scanning sequence: FSE T1WI scan and enhanced scan, fast inversion recovery sequence (T2 fs FRFSE) and three-dimensional fast low angle shot imaging scan and enhanced image subtraction (3D-FSPGR) analysis and comparison of 3 kinds of sequence, then analyzed and compared the diagnostic value of the 3 sequences. Results A total of 43 different types of anal fistula were found in 30 patients. 43 lesions were external anal fistula fistula, anal fistula and accurate display of T2 fs FRFSE 18 (41.86%), FSE enhanced T1W accurately display the external anal fistulas in 25 (58.14%), 3D-FSPGR accurately displayed outside the anal fistula fistulas in 40 (93.02%), of which 3D-FSPGR of anal fistula significant accuracy rate was significantly higher than that of T2 fs FRFSE and FSE T1WI (P<0.05). T2 fs FRFSE accurately showed 10 lesions(35.71%) and 10 FSE (T1W) enhancement of fistula in the anal fistula, and 14 lesions(50.00%) of the fistula in the anal fistula. The 3D-FSPGR accurately showed 23 lesions(82.14%) of the fistula in the anal fistula, and the significant accuracy rate of 3D-FSPGR for the anal fistula was significantly higher than that of T2 fs FRFSE and FSE T1WI (P<0.05). T2 fs FRFSE accurately display the fistula 29 branches(56.86%), FSE enhanced T1W accurately display the fistula 34 branches (66.66%), 3D-FSPGR accurately display the fistula 45 branches (88.23%), of which 3D-FSPGR of branch fistula significant accuracy was significantly higher than that of T2 fs FRFSE and FSE T1WI (P<0.05). Conclusion 3D-FSPGR sequence is a sensitive method for preoperative diagnosis of anal fistula. It can improve the display rate of internal fistula,external fistula and anal fistula. Combined with other scanning sequences, we can get a more clear preoperative diagnostic result.