Methods The data was surveyed by 2D HFU, such as tumor shape, boundary, internal echo, attenuation and small calcification.Benign tumors of breast were the control group.

• 方法 应用高频二维超声对乳腺恶性肿瘤观察以下指标：病灶形态，病灶边界，病灶周围，病灶内部，病灶后方及有无微小钙化灶，同时选择乳腺良性肿瘤作对照组。