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目的探讨磁共振扩散加权成像(DWI)和表观弥散系数(ADC)在肝脏结节性肝癌和血管瘤中诊断和鉴别诊断中价值。方法对79例肝脏实性结节性病变(肝癌47例,血管瘤32例),进行磁共振的DWI扫描,利用功能软件FunctoolADW4.3测量结节性病变的ADC值,进行对比分析。结果肝脏结节性肝癌在DWI上为均匀的稍高信号,边界非常清楚,血管瘤在DWI上也是均匀的更高信号,边界非常清楚;在1.5 T上,ADC值测量的平均值血管瘤高于转移性结节性肝癌(P<0.05),转移性结节性肝癌高于原发性结节性肝癌(P<0.05);在3.0 T上,ADC值测量的平均值血管瘤高于转移性结节性肝癌(P<0.05),结节性转移性肝癌高于原发性结节性肝癌(P<0.05)。结论依据磁共振DWI图像和ADC值,对肝脏结节性肝癌和血管瘤的诊断和鉴别诊断有重要的价值。
Objective To investigate the value of magnetic resonance diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) in the diagnosis and differential diagnosis of hepatic nodular liver cancer and hemangiomas. Methods Seventy-nine cases of liver solid nodular lesions (47 cases of hepatocellular carcinoma and 32 cases of hemangiomas) were subjected to magnetic resonance imaging (DWI). The ADC values of nodular lesions were measured using Functool ADW 4.3 software and compared. Results Liver nodular hepatocarcinoma was evenly hyperintense on DWI with well-defined boundaries. Hemangiomas were evenly higher signals on DWI with well-defined boundaries; at 1.5 T, the mean value of ADC measurements was high in hemangiomas. In metastatic nodular hepatocellular carcinoma (P<0.05), metastatic nodular hepatocellular carcinoma was higher than primary nodular hepatocellular carcinoma (P<0.05); at 3.0 T, the mean value of ADC measurements was higher than that of hemangiomas. Nodular liver cancer (P<0.05), nodular metastatic liver cancer was higher than primary nodular liver cancer (P<0.05). Conclusions Based on magnetic resonance DWI images and ADC values, it is of great value in the diagnosis and differential diagnosis of hepatic nodular liver cancer and hemangiomas.