Purpose To evaluate the diagnostic value of non-contrast-enhanced MR venography (NCE-MRV) for Budd-Chiari syndrome (BCS). Materials and Methods NCE-MRV and digital subtraction angiography (DSA) examination were performed in thirty-five patients with suspected BCS. The diagnostic agreement between them were compared. The sensitivity, specificity, accuracy, negative predictive value and positive predictive value were also calculated. Results In all 35 patients, 32 were diagnosed as BCS on DSA, and 33 on NCE-MRV. DSA showed inferior vena cava membrane stenosis in 8 patients compared to 10 on NCE-MRV;membrane obstruction in 7 compared to 6 on NCE-MRV, segmental stenosis in 3 compared to 4 on NCE-MRV;segmental obstruction in 10 compared to 10 on NCE-MRV, IVC thrombosis in 5 compared to 5 on NCE-MRV. The sensitivity, specificity, accuracy, negative predictive value and positive predictive value of NCE-MRV in diagnosing BCS were 100.0%, 67.8%, 97.1%, 100.0%and 96.9%, respectively. There was good intra-modality agreement (Kappa=0.89). NCE-MRV also demonstrated intra-hepatic collaterals in 30 patients, extra-hepatic collaterals in 27 cases, and accessory hepatic veins in 25 cases. Conclusion NCE-MRV has excellent diagnostic agreement with DSA in diagnosing inferior vena cava lesion in patients with BCS. It may be used in noninvasive diagnosis.%目的：探讨非增强MR血管成像（NCE-MRV）在布加综合征（BCS）诊断中的应用价值。资料与方法35例怀疑BCS患者均行NCE-MRV和数字减影血管造影（DSA）检查，比较两者的一致性，并计算NCE-MRV的诊断敏感度、特异度、准确度、阴性预测值及阳性预测值。结果35例患者中，32例DSA诊断为BCS，33例NCE-MRV诊断为BCS，DSA显示下腔静脉膜性狭窄8例（NCE-MRV 10例），膜性阻塞7例（NCE-MRV 6例），节段性狭窄3例（NCE-MRV 4例），节段性阻塞10例（NCE-MRV 10例），下腔静脉血栓5例（NCE-MRV 5例）。NCE-MRV诊断BCS的敏感度为100.0%，特异度为67.8%，准确度为97.1%，阴性预测值为100.0%，阳性预测值为96.9%。NCE-MRV与DSA相比较具有良好的一致性（Kappa=0.89）。NCE-MRV显示肝内侧支血管30例，肝外侧支血管27例，副肝静脉25例。结论 NCE-MRV对于BCS下腔静脉病变的诊断与DSA对比有良好的一致性，可以作为BCS可疑患者诊断下腔静脉阻塞的无创检查手段。
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