Abstract: Objective The aim of this study was to analyze the magnetic resonance imaging (MRI) with accelerated volume acquisition (LAVA) technology in evaluating collateral circulation in patients with Budd-Chiari syndrome (BCS). Methods 47 patients with BCS were admitted to our hospital between March 2017 and March 2022, and all underwent digital subtraction angiography (DSA) and MRI scan. The DSA results acted as the "gold standard" to determine the accuracy(Ac) of MRI LAVA on BCS typing and the collateral circulation. Results Among the 47 patients with BCS, the DSA showed hepatic vein occlusion in 18 cases, inferior vena cava occlusion in 21 cases, and mixed type in 8 cases, and the MRI LAVA found hepaticvein occlusion in 16 cases, inferior vena cava occlusion in 21 cases, and mixed occlusion in 10 cases,with the Ac of 95.7%; the MRI LAVA also showed inferior phrenic vein dilatation in 9 cases(19.1%), the intrahepatic communicating branch in 12 cases (25.5%), the superficial abdominal vein dilatation in 26 cases(55.3%), the accessory hepatic vein in 26 cases(55.3%), the azygos/hemiazygos vein in 39 cases(83.0%); the Ac in demonstrating accessory hepatic vein by MRI LAVA was 100%, as compared to by DSA. Conclusion The MRI LAVA scanning could accurately determine the classification of BCS and the collateral circulation establishment, which might   guide the clinicians for appropriate management.

Key words: Budd-Chiari syndrome, Magnetic resonance imaging, Liver acceleration volume acquisition technique, Collateral circulation, Diagnosis