菲立磁增强MRI对局灶性肝病的检出价值

目的 :着重探讨菲立磁增强扫描对局灶性肝病的检出价值。方法 :收集经螺旋CT增强扫描及菲立磁MRI增强扫描且临床、手术病理证实局灶性肝病 2 6例 5 7个病灶 ,采用分组盲法ROC曲线分析对比评价菲立磁增强MRI与螺旋CT增强扫描对局灶性肝病的检出价值。结果 :联合平扫MRI 增强MRI与其它三种方法之间比较 ,Az最大为 0 975 0 ,P <0 0 5 ,单独菲立磁增强MRI的Az=0 9315虽然大于平扫MRI的Az=0 92 2 6 ,但两者间差异无显著性 ,P >0 0 5 ,CT与其它三种方法之间比较 ,病灶检出Az =0 82 70最小 ,P <0 0 5。结论 :菲立磁增强MRI对肝局灶性病变的检出价值优于螺旋CT增强扫描。联合分析平扫 菲立磁增强MRI的肝局灶性病灶的检出价值优于单独分析菲立磁增强法。

The Detection Value of Focal Hepatic Lesions with Feridexs - Enhanced MR Imaging

Objective:We compared radiologist's performance on combined unenhanced and feridexs-enhanced MR imaging with their performance on helical CT enhanced,unenhanced MRI,and feridexs-enhanced MR alone imaging for the detection of local hepatic lesions.Methods:MR images and CT scans obtained in 26 patients with 57 local hepatic lesions were analyzed with ROC analysis.The imaging of patient were divided into 4 groups including combined unenhanced and feridexs-enhanced MR imaging group,helical CT enhanced group,unenhanced MRI group,and Feridexs-enhanced MR alone group.Results:The combined approach resulted in larger area under the ROC curve(Az=0.9750)and accuracy(86.8%)(P<0.05),as compared with the others methods.Although the area under the ROC curve of Feridexs-enhanced MR alone group is larger than that of unenhanced group,there are no significant difference between this two groups in statistics(P>0.05).The area under the ROC curve of CT group is the most smallest as compare with the other groups(Az=0.8270,P<0.05).Conclusion:Feridexs-enhanced MR imaging was more accurate than enhanced helical CT scan in detection of local hepatic lesion.The combined analysis of unenhanced and feridexs-enhanced images was more accurate in the detection of focal hepatic lesions than was review of feridexs-enhanced images alone.