DESS与MEDIC磁共振序列在腰骶部脊神经成像的比较研究

摘要

Objective To cvalnate dual echo steady state precession (dual echo steady the state, DESS) sequence of multi-echo data image overlap (multi the echo the data image combination, MEDIC) sequence in the lumbosacral spinal nerve and their diagnostic value. Methods 32 cases of lumbar disorders underwent lumbar spine routine MRI sequences (sagittal T1WI, T2WI, axial T2WI) double-echo steady-state precession (DESS) sequence and multi-echo data combined (MEDIC) sequence scan DESS sequence and the MEDIC sequence of all image processing, 3D maximum intensity projection (MIP). MIP reconstruction image showed the morphology of the lumbosacral nerve length as well as spinal nerve and the two senior MRI diagnostic imaging physicians the imaging reviewed the performance of the lesions and evalnated the clinical diagnostic value of the DESS sequence and the MEDIC sequence. Results The DESS sequence scanning time was short, space resolution and signal-to-noise ratio was high, the nerve branch was displaed more and got the original image. The reconstruction images can clearly display lesions and lumbosacral spinal nerve relationship. Conclusion DESS sequence in the lumbosacral spinal nerve mri (magnetic resonance imaging) image is better than the MEDIC sequence.%目的 评价双回波稳态进动(dual echo steady state,DESS)序列与多回波数据图像重合(multi echo data image combination,MEDIC)序列在腰骶部脊神经的显示情况及病变的诊断价值.方法 对32例腰疾患者行腰椎MRI常规序列(矢状位T1WI,T2 WI,横轴位T2 WI),双回波稳态进动(DESS)序列和多回波数据联合(MEDIC)序列扫描,DESS序列和MEDIC序列的所有图像均用3D最大信号强度投影(MIP)后处理,由2位高级职称MRI影像诊断医师通过对MIP重建后图像所显示的腰骶部脊神经的形态、长度以及脊神经与病变的影像表现,评价DESS序列和MEDIC序列的临床诊断应用价值.结果 DESS序列扫描时间较短、空间分辨率及信噪比高、神经分支显示多,获得的原始图像及重建图像可以清晰显示病灶与腰骶脊神经的关系.结论 DESS序列在腰骶脊神经磁共振成像的图像优于MEDIC序列.