摘要
目的评价增强减影 MRI 诊断脊柱转移瘤的价值。方法收集43例经病理证实为脊椎转移瘤患者的完整 MRI 资料,统计常规 MRI FSE 序列 T_1WI、STIR(短时间反转恢复)、T_1WI 增强和增强减影4种磁共振成像方法发现脊椎转移瘤的病灶数量、影像征象(包括毛刺征、边缘不规则与牛眼征),组间数据采用多个独立样本非参数检验,P<0.05认为差异具有统计学意义。结果 43例共发现66个椎体转移瘤,其中有椎体形态改变35个,椎体形态正常31个,有椎体形态改变的椎体转移瘤在各成像方法中检出率为100%,无差异性,无椎体形态改变的椎体转移瘤检出率以 STIR 最高;对诊断椎体转移瘤有特征性意义的影像特征的检出率以增强减影最高,差异有统计学意义。结论 MR 增强减影成像对发现椎体转移瘤瘤灶与瘤灶的影像特征方面具有重要的诊断价值,是一种经济、简便、有效提高椎体转移瘤检出率与正确率的成像方法。
Objective To evaluate the contrast-enhanced digital subtraction MRI in the diagnosis of vertebral metastasic tumors. Methods 66 vertebral metastasic tumors in 43 patients were examined with conventional MRI (T1WI, STIR and Contrast--enhanced T1WI) and contrast--enhanced digital subtraction MR imaging. All lesions were histologically proved. The quantity and characteristic imaging signs (including spiculation, bull eye sign and irregular edge) of lesions were detected separately by different sequences. K independent samples test was used. Results The detection rates of 35 vertebral metastasic tumors with vertebral morphological changes were same in all MR sequences. But in the other 31 lesions without vertebral morphological changes, the detection rates were different and STIR was the highest in all sequences. Contrast-enhanced digital subtraction MRI was more sensitive than all the conventional MR sequences in finding characteristic imaging signs with statistically significant differences. Conclusion Contrast enhanced subtraction MRI is an useful and convenient technique which has great value in finding vertebral metastasic tumors and depicting the characteristic imaging signs.
出处
《影像诊断与介入放射学》
2008年第4期176-179,共4页
Diagnostic Imaging & Interventional Radiology
基金
广东省教育厅研究基金(203040)
关键词
脊柱
转移瘤
增强减影
磁共振成像
Vertebral
Metastasic tumor
Contrast--enhanced digital subtraction
Magnetic resonance imaging (MR/)