腔静脉三维动态增强磁共振血管成像

目的 评价三维动态增强磁共振血管成像（３Ｄ ＤＣＥ ＭＲＡ）用于诊断腔静脉病变的价值。方法 ５２例疑有腔静脉畸形、血栓形成、狭窄、闭塞或受压的患者接受了３Ｄ ＤＣＥ ＭＲＡ成像检查。分析３Ｄ ＤＣＥ ＭＲＡ的图像质量及其对各种腔静脉病变和侧支循环的显示情况，并把３３例３Ｄ ＤＣＥ ＭＲＡ同常规腔静脉造影术（１５例）和手术（１８例）进行比较。结果 ５２例３Ｄ ＤＣＥ ＭＲＡ图像均无伪影，血管显示清楚

Three dimensional dynamic contrast enhanced magnetic resonance angiography of the vena cava

Objective To evaluate the usefulness of three dimensional dynamic contrast enhanced magnetic resonance angiography(3D DCE MRA) in the diagnosis of vena caval abnormalities. Methods 3D DCE MRA was performed on fifty two patients with suspected vena caval anomaly, thrombosis, stenosis, occlusion, or compression. Image quality and the presence of venous abnormalities and collaterals were evaluated. Comparison with conventional venacavography( n =15) and surgical findings( n =18) was made. Results 3D DCE MRA images were of diagnostic quality without artifact for all 52 patients. 3D DCE MRA clearly showed vascular anatomy, anomaly and various disorders. The site, extent, cause of venous obstruction, and collateral pathways were well depicted. According to venography or surgery, the sensitivity and specificity of 3D DCE MRA in the diagnosis of abnormalities of vena cava were both 100%. In addition, it had advantages regarding demonstration of extravascular lesions and multiplanar capabilities. Conclusion 3D DCE MRA is simple to perform and accurate in detecting various vena caval abnormalities.