目的探讨与分析磁共振弥散加 权成像用于诊断肝脏良恶性病变临床价 值。方法 120例肝脏占位性病变者(232 个病灶)分别采用1.5T磁共振扫描仪扫描 检查，然后选取不同b值进行DWI成像及高 分辨T2加权成像，测量ADC值。结果 使用 低b值时，肝脏各种占位性病变ADC值差异 有统计学意义(P<0.05)；中b值及高b值 时，肝脏良恶性病变ADC值差异有统计学 意义(P<0.05)；高b值时，肝癌和肝转移 瘤与正常肝组织ADC值差异有统计学意义 (P<0.05)。结论 通过比较肝脏占位性病 变的DWI图像特点及ADC值的不同范围，可 准确的判断病变的性质，对肝脏占位性病 变的良、恶性判断有较大的价值，瘤/肝 比对原发性肝癌及肝转移瘤的鉴别具有一 定意义。

Objective To discuss and analyze the value of magnetic resonance diffusion weighted imaging in the diagnosis of benign and malignant liver lesions. Methods 120 cases with hepatic lesions were (232 lesions) underwent 1.5T MRI scanning. Different b values were selected to exert DWI and high-resolution T2WI, and ADC values were measured. Results Differences of ADC values among various liver lesions had statistical significance (P<0.05) by low b value; Differences of ADC values between benign and malignant liver lesions had statistical significance (P<0.05) by medium and high b value; Differences of ADC values between liver cancer and liver metastatic tumor and healthy liver had statistical significance (P<0.05) by high b value. Conclusion Lesions can be clearly diagnosed by comparing the characteristics of DWI images and different range of ADC value, and DWI has great value in the diagnosis of liver occupying lesions, and the tumor / liver ratio has certain value in the differential diagnosis of primary liver cancer and liver metastatic tumor.