very high frequency sound; used in ultrasonography
using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs
双语例句
The resulting ultrasonic sound wave can then be directed out in a tightly controlled beam. 由此超声音波可以用严格控制声音的方向。
Ultrasound of intra-osseous lesions in the mature skeleton would normally be precluded by almost complete reflection of sound from the cortical bone surface. 由于骨皮质对超声声束的几乎完全的反射，超声显示成骨内病变较为困难。
