- The visualization of deep structures of the body by recording the reflections of echoes of pulses of ultrasonic waves directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.
Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
- High frequency sound waves used to identify and examine internal organs and structures without the invasive hazards of X xays, dyes, or fluoroscopy.
Definition from: CRISP Thesaurus via Unified Medical Language System at the National Library of Medicine
- A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs and make echoes. The echo patterns are shown on the screen of an ultrasound machine, forming a picture of body tissues called a sonogram. Also called ultrasonography.
National Cancer Institute
See also Understanding Medical Terminology.