GRE-T2*WI、FSE-T2WI、STIR序列在脊柱转移瘤MRI的应用比较

目的：比较3种MRI扫描序列在脊柱转移瘤的应用，探讨各种方法的序列设计特点、信号特点及适用性。方法：50例证实为脊柱转移瘤的患均进行矢状GRE—T2^*WI、FSE—T2WI、STIR序列扫描，并与矢状T1WI图像对照，比较3种序列对椎体、附件骨质破坏，脊髓受压、受侵，椎间盘、椎旁软组织肿块的显示情况。结果：GRE—T2WI和STIR序列显示脊柱转移瘤椎体、附件骨质破坏较优；FSE—T2WI显示脊髓受压、受侵的情况较优；软组织肿块的显示基本一致。结论：矢状GRE-T2^*WI可作为脊柱转移瘤常规扫描序列的首选，FSE—T2WI如有脊髓受压、受侵时可作为常规扫描序列；STIR是常规扫描的补充。

Application and Comparison of GRE T2*WI,FSE T2WI and STIR Pulse Sequences in Diagnosis of Spinal Metastatic Tumors

Objective:To compare the three MRI pulse sequences of GRE T_2~*WI,FSE T_2WI and STIR in diagnosis of spinal metastatic tumor,to study the pulse sequence characteristics,signal characteristics and applicabilities of the three kinds of methods.Methods:50 cases of pathologically proved spinal metastatic tumor underwent MRI with the pulse sequences of sagitttal GRE T_2~*WI,FSE T_2WI and STIR,which were also compared with sagitttal T_1WI.The ability of the three sequences for the demonstration of bony destruction of vertebral body and appendices,compression or invasion of the spinal cord,involvement of the intervertebral disc and paravertebral soft tissue mass was compared.Results:GRE T_2*WI and STIR sequences could better show the destruction of vertebral body and appendices.FSE T_2WI could better demonstrate the compression and invasion of the spinal cord.The soft tissue mass could be shown by both sequences in a similar manner.Conclusion:The sagittal GRE T_2*WI can be used as the first choice method for the diagnosis of spinal metastatc tumor.For demonstration of the compression and invasion of the spinal cord the FSE T_2WI can be used as a routine sequence.The STIR is a complement of the above mentioned sequences.