主动脉疾病MR成像技术探讨

为评价不同MR成像序列在主动脉疾病诊断中的价值。将45例患者（其中34例主动脉夹层，11例主动脉瘤），经自旋回波、梯度回波、单层多相采集及动态显示扫描。结果发现，在主动脉夹层患者中，SE及GRE序列的主动脉双腔、内膜片、内膜破口的显示率分别为100％、89％、30％，100％、100％、47％。在主动脉瘤患者中，SE及GRE序列均能显示主动脉梭形或局限性扩张。提示MR对主动脉疾病有肯定的价值，其中GRE序列对显示主动脉夹层的诊断更有意义。

Study on the technique of MRI in Aortic Diseases

To evaluate the value of various techniques of MRI in the diagnosis of aortic diseases, 45 patients covering 34 cases of dissecting aneurysm of aorta and 11 of aortic aneurysm were studied. The used techniques included: fast multiplanner spoiled gradient-recalled echo (FMPSPGR) in the coronal, T1-weighted SE and gradient-recalled echo (GRE) in the axial, GRE in the oblique coronal, single-plane-multiphase accquission and paging. The results showed that In dissecting aneurysm of aorta, the presented rate of double-tube of aorta, piece of tunica intima, laceration of tunica intima by using SE and GRE was 100 %, 89 %, 30 %, and 100%, 100 %, 47 % respectively. In aortic aneurysm, both SE and GRE can display the fusiform or localized enlarged aorta. It was certain that MRI was an important method in the diagnosis of aortic disease. GRE was more helpful in the diagnosis of dissecting aneurysm of aorta than SE.