磁共振弥散加权成像对肝脏常见占位性病变诊断应用价值的研究

目的 探讨磁共振弥散加权成像(DWI)在筛选和鉴别肝脏良恶性病变中的临床应用价值.方法 对70例肝脏占位性病灶(肝癌30例,肝转移瘤20例,肝血管瘤20例)行DWI检查,并测量表观弥散系数(ADC)值来进行判断肝脏占位病变的良恶性.结果 DWI在显示恶性病灶,特别是显示多发小病灶转移瘤,要比CT增强扫描更有优势.肝细胞癌和转移瘤的ADC值均低于血管瘤的ADC值,并且差异具有统计学意义(P<0.05).结论 DWI及ADC值的应用大大提高了MR对肝脏恶性肿瘤的诊断和鉴别诊断能力.

The application value of diffusion-weighted imaging in diagnosis of liver space-occupying lesions

Objective To evaluate the utility of diffusion-weighted imaging（DWI）in screening and differential diagnosis of benign and malignant focal hepatic lesions.Methods DWI were performed for 70 liver focal masses（hepatocellular carcinoma 30,liver metastatic tumors 20 and liver hemangioma 20）and ADC were measured to differentiate benign from malignant lesions on DWI.Results DWI showed higher contrast between malignant lesions（especially in multiple small metastatic tumors）and surrounding liver parenchyma than contrast-enhanced computed tomography.ADC values of hepatocellular carcinoma and metastatic tumors were lower than that of hemangioma,and the differences had statistical difference（P0.05）.Conclusions The application of DWI and ADC value can greatly improve the ability to differentiate benign from malignant hepatic lesions.