目的 研究乏脂肪肾血管平滑 肌脂肪瘤(RAML)和肾癌的弥散加权成像 (DWI)信号特点及病灶表面扩散系数(ADC) 的关系。方法 选取2014年2月至2016年7 月经我院病理确诊且具有完整MRI检查资 料的乏脂肪RAML患者30例设为观察组。 另取同期病理确诊具有完整MRI检查资料 的肾癌患者30例设为对照组。分别对比 两组患者基本资料、DWI信号特点以及 ADC值。结果 观察组年龄为(47.5±6.2) 岁，显著低于对照组的(63.4±7.3)岁， 差异有统计学意义(P＜0.05)。观察组DWI 信号特点为低、稍高信号，而对照组DWI 表现为不均匀高信号。观察组ADC值为 (1.622±0.183)×10-3mm2 /s，显著高于对 照组的(1.454±0.282)×10-3mm2 /s，差异 有统计学意义(P＜0.05)。结论 ADC值可 作为临床上诊断乏脂肪RAML与肾癌的新指 标，具有较高的应用价值。

Objective To study the relationship between the characteristics of diffuse weighted imaging of renal cell carcinoma(RCC) and renal angiomyolipomas(RAML) with minimal fat and the surface diffusion coefficient (ADC) of the lesions. Methods A total of 30 cases of RAML patients with complete MRI examination data were set as observation group, and another 30 patients with RCC were set as the control group from February 2014 to July2016 in our Hospital. The patients' basic information, DWI signal characteristics and ADC values were respectively compared between the two groups. Results The age of the observation group was (47.5+6.2) years, which was significantly lower than that of the control group (63.4+7.3) years old, and the difference was statistically significant (P<0.05). The characteristics of the DWI signal in the observation group were low and slightly high, while the DWI signal in the control group was unevenly high. The observation group ADC=(1.622+0.183)×10-3mm2 /s, significantly higher than the control group (1.454+0.282)×10-3mm2 /s, the difference was statistically significant(P<0.05). Conclusion The value of ADC can be used as a new index for clinical diagnosis of RAML with minimal fat and renal cancer. It is of high application value.