MR T1WI与STIR脂肪抑制序列对脊柱转移瘤诊断价值探讨

目的通过对40例脊柱转移瘤患者,采用STIR(短时间反转恢复)和FE/Fsat(场回波/脂肪抑制)两种不同方法的脂肪抑制序列进行检查对比,评价二者的诊断准确性。方法收集我院2002年1月～2005年3月,经MR检查病理证实的40例脊柱转移性病变,采用日本东芝FLEXART0.5T超导磁共振扫描仪,常规采用矢状位SE:T1WI、FSE:T2WI序列,同时进行STIR和FE/Fsat两种脂肪抑制序列扫描,必要时加做轴位和冠状位扫描。结果40例累及66个椎体,椎体形态改变29例,42个椎体,表现为椎体变扁,前后径增宽;24个椎体形态表现正常。单椎体转移9例,其中形态正常3例。向椎管内生长且压迫相应硬膜囊和脊髓5例。经采用配对样本t检验统计学处理,P值<0.001,病灶边界情况及信号强度的比较差异有显著性意义。结论STIR脂肪抑制序列对脊柱转移性病灶的发现比FE/Fsat脂肪抑制序列更有优势。

Diagnostic value of fat saturation T1 WI and STIR in patients with vertebral metastases

Objective To compare the diagnostic value of STIR and FE/Fsat sequences in vertebral metastasis,and assess their diagnostic accuracy.Methods Forty cases with vertebral metastases,confirmed by pathology in our hospital from January 2002 to March 2005,were retrospectively analyzed.The conventional sequences were SE T_1WI,and FSE T_2WI,with STIR and FE/Fsat performed at the same time.Results Of 40 cases,66 vertebraes were involved.Among them,42 vertebraes were metamorphosed,and 24 vertebraes were normal;Only nine cases with single vertebral metastasis were found and of them three vertebraes were in normal shape.The epidural space of five cases were compressed by the tumor.By paired t-test,the significant difference was found between STIR and FE/Fsat in signal of lesion(P<0.001).Conclusion STIR sequence is superior to FE/Fsat in demonstrating the metastases in vertebral column.