目的探讨LAVA增强磁共振检查 与高频腔内B超对高位复杂性肛瘘的术前 诊断价值。方法 回顾分析经手术证实的 50例高位复杂性肛瘘的MRI图像及B超图 像，以手术结果为标准，比较术前LAVA 增强磁共振检查与高频腔内B超的结果。 结果 以手术结果为标准，高频腔内B超 与LAVA增强磁共振检查的结果相比较， 肛瘘内口定位准确率分别为91.1％和 82.2％(X2 =1.53，P＞0.05)，支管显示率 为62.2％和88.8％(X2 =8.66，P<0.01)， 肛周脓肿显示率为(95％和100％) X2 =1.07，P＞0.05)，其它并发症显示率 (50％和100％)(X2 =8.6，P<0.01)，肛瘘 内口及肛周脓肿定位准确率差别无统计 学意义，支管及其它并发症显示率差别 具有高度统计学意义。结论 高频腔内 B超适用于单纯性肛瘘的术前诊断，而 LAVA增强磁共振检查更适用于高位复杂 性肛瘘的术前诊断。

Objective To investigate the value of LAVA-enhanced magnetic resonance imaging and high frequency cavity B ultrasound of high complex anal fistula preoperative diagnosis. Methods a retrospective analysis of 50 cases verified by operation of high complex anal fistula B ultrasound image and MRI image, the operation results as the standard, comparison of LAVA-Enhanced magnetic resonance imaging and high frequency cavity B ultrasound results. Results the operation result as the standard, high frequency cavity B ultrasound and LAVA-Enhanced magnetic resonance imaging results compared, accuracy rate of export orientation in the anal fistula were 91.1% and 82.2% (X2 =1.53, P>0.05), branch display rate was 62.2% and 88.8% (X2 =8.66, P<0.01), perianal abscess display rate (95% and 100%) X2 =1.07, P>0.05), other complications display rate (50% and 100%) (X2 =8.6, P<0.01). export orientation in the anal fistula and perianal abscess localization accuracy without significant difference. Branch and other complications showed highly significant difference. Conclusion high frequency cavity B ultrasound diagnosis for simple anal fistula preoperative diagnosis, whereas LAVA-enhanced MRI is more suitable for high complex anal fistula preoperative.