sonogram

Here, we emphasize the preference for sonogram over mammogram.

我们强调诊断种疾病时，超音波优于乳房摄影。

Dolichocephaly (i.e., a long, thin head) is present on this sonogram, and can only be revealed by determining the cephalic index.

图中所见的长头(头特别长、扁)，只能用头指数来定量诊断。