ultrasound

• 指频率高于人类听觉上限的声波，常用于医学成像，通过回声生成体内器官、组织或胎儿等内部结构的图像；也指这种超声检查或超声图像本身。

A noun referring to high-frequency sound waves used in medical imaging to create images of internal body structures, such as organs or a developing fetus.

不可数

1. High-frequency soundB2formalscientific

   Sound waves with frequencies higher than the upper audible limit of human hearing, typically above 20,000 hertz.

   超声波

   • Bats use ultrasound to navigate in the dark.
   • Ultrasound is used in industrial cleaning to remove dirt from delicate objects.
   • The device emits ultrasound waves to detect cracks in metal.

2. Medical imaging techniqueB1formalmedical

   A diagnostic imaging procedure that uses high-frequency sound waves to create images of internal body structures, often used to monitor fetal development or examine organs.

   超声检查

   • The doctor performed an ultrasound to check the baby's growth.
   • An abdominal ultrasound can help diagnose liver problems.
   • She had an ultrasound to examine her thyroid gland.

   同义词echographysonographyultrasonography