Arkansas Society of

Radiologic Technologists

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Ultrasound

Ultrasound image

Ultrasound, also called sonography or diagnostic medical sonography, is an imaging method that uses high-frequency sound waves to produce images of structures within the body. Most ultrasound examinations are done using a sonar device (transducer) outside the body with gel, though some ultrasound examinations involve placing the transducer inside the body.

Ultrasound is used for a variety of reasons, including to:

  • View the uterus and ovaries of a pregnant woman and assess her fetus
  • Diagnose gallbladder disease
  • Evaluate flow in blood vessels
  • Guide a needle for biopsy or tumor treatment
  • Evaluate a breast lump
  • Check a thyroid gland
  • Diagnose some cancers
  • Reveal genital and prostate abnormalities