目的 分析超声及磁共振成像 (MRI)对临床触诊阴性乳腺癌的诊断价 值。方法 回顾性分析我院临床触诊阴性 而经病理确诊的乳腺癌患者(观察组)及经 病理确诊为乳腺良性肿瘤患者(对照组) 各78例临床资料。比较两组MRI及超声影 像学特点差异，并记录MRI及超声对观察 组的诊断准确率差异。结果 两组形态、 边缘、T1WI、T2WI、强化等MRI影像学特 点及形态、边界、回声、微钙化、后方 回声衰减、阻力指数等超声影像学特点 比较，差异均有统计学意义(P＜0.05)。 MRI对观察组诊断准确率明显高于超声(P ＜0.05)。结论 超声及MRI均对诊断临床 触诊阴性乳腺癌有重要作用，但MRI诊断 准确率更高，于后续临床治疗能提供更全 面的影像学依据。

Objective To analyze the diagnostic value of ultrasound and magnetic resonance imaging (MRI) for patients with nonpalpable breast cancer. Methods The clinical data of each 78 patients who were nonpalpable and diagnosed as breast cancer by pathology in our hospital (observation group) and those diagnosed as benign breast tumors (control group) were analyzed retrospectively. The differences in MRI and ultrasound imaging features were compared between the two groups, and the differences in diagnostic accuracy between MRI and ultrasound was recorded. Results There were statistically significant differences in the MRI imaging features of morphology, margin, T1WI signal, T2WI signal and enhancement and the ultrasound imaging features of morphology, boundary, echo, microcalcification, posterior echo attenuation, and resistance index between the two groups (P<0.05). The diagnostic accuracy of MRI in observation group was significantly higher than that of ultrasound (P<0.05). Conclusion Both ultrasound and MRI have important effects in the diagnosis of nonpalpable breast cancer, but the diagnostic accuracy of MRI is higher, and MRI is more favorable in subsequent clinical treatment.