三维动态增强磁共振血管成像表面重建在主动脉弓畸形诊断中的价值初探

目的 探讨三维动态增强磁共振血管成像（3－dimensional dynamic contrast enhanced MRA,3D DCE MRA)表面重建（surface shade display,SSD）对主动脉弓畸形的诊断价值。方法 磁共振血管成像确诊的9例主动脉弓畸形中，2例行时间飞跃法磁共振血管成像（2－dimensional time-of-flight MRA,2D TOF MRA）检查，6例行3D DCE MRA检查，1例同时行2D TOF MRA及3D DCE MRA检查。结果 5例迷走锁骨下动脉及3例颈位主动脉弓的显示，3D DCE MRA优于2D TOF MRA，SSD优于最大强度投影（MIP）；1例右位主动脉弓的显示，MIP同SSD；2例主动脉弓褶曲及1例主动脉弓离断的显示，SSD优于MIP。结论 对于主动脉弓畸形的显示，SSD是3D DCE MRA最好的方法。

Primary evaluation on the value of the surface shade display of 3-dimensional dynamic contrast enhanced MRA in diagnosing the aortic arch malformation

Objective To Evaluate primarily the value of surface shade display (SSD) of 3 dimensional dynamic contrast enhanced MRA (3D DCE MRA) in diagnosing the variable aortic arch malformations Methods 2D TOF MRA in 2 of 9 cases, 3D DCE MRA in 6 of 9 cases and two methods in 1 of 9 cases were performed Results 3D DCE MRA was superior to 2D TOF MRA in demonstrating 5 aberrant subclavian arteries and 2 cervical aortic arches, SSD was superior to MIP in showing 2 cervical aortic arches, 2 kinking of aortic arches and 1 interrupted aortic arch, but two reconstruction methods were the same in revealing one right aortic arch Conclusion SSD might be the best reconstruction method of 3D DCE MRA in displaying aortic arch malformation