目的 探讨磁共振扩散加权成像 (DWI)对卵巢良恶性实性肿瘤的鉴别诊断 价值。方法 回顾性分析经病理证实的41 例卵巢肿瘤的术前MRI及DWI表现(肿瘤的 部位、数目、形态、信号特点),测量肿瘤 大小、ADC值，通过独立样本t检验比较 良恶性肿瘤的大小及ADC值有无统计学差 异。结果 41例51个卵巢肿瘤，其中良性 23个，恶性28个，肿瘤大小、ADC值无统 计学差异(P值分别为0.356,0.082)。结 论 ADC值对卵巢良恶性实性肿瘤的鉴别诊 断无价值，但DWI信号特点结合常规MRI检 查，有可能提供有价值的信息。

Objective To explore the value of diffusion-weighted MRI in differentiating ovarian solid tumors. Methods 41 patients with pathology proven ovarian solid tumors, who had conventional MRI and DWI scanning preoperatively. The basic MR features(location, amount and shape), signal intensity characteristics of conventional MRI and DWI were compared. The size and ADC values of all ovarian tumors were calculated. Student's t test to compare the difference between benign ovarian tumors and malignant ones in size and ADC value. Results Of this group, there were 51 ovarian tumors(23 benign and 28 malignant masses). It is no statistical significance between the size, ADC values of the benign and malignant ovarian tumors (P=0.356,0.082). Conclusion The difference between ADC values of the benign and malignant ovarian tumors was no statistical significance. DWI combined with the conventional MRI is probable to provide the useful information.