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Ultrasound imaging, also called ultrasound scanning or sonography, involves exposing part of the body to high-frequency sound waves to produce pictures of the inside of the body. Ultrasound exams do not use ionizing radiation (x-ray). Because ultrasound images are captured in real-time, they can show the structure and movement of the body's internal organs, as well as blood flowing through blood vessels.

Ultrasound imaging is usually a painless medical test that helps physicians diagnose and treat medical conditions.

Conventional ultrasound displays the images in thin, flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats the sound wave data into 3-D images. Four-dimensional (4-D) ultrasound is 3-D ultrasound in motion.

A Doppler ultrasound study may be part of an ultrasound examination.

Doppler ultrasound is a special ultrasound technique that evaluates blood as it flows through a blood vessel, including the body's major arteries and veins in the abdomen, arms, legs and neck.

Ultrasound examinations can help to diagnose a variety of conditions and to assess organ damage following illness.

Ultrasound is used to help physicians diagnose symptoms such as:

  • pain
  • swelling
  • infection

Ultrasound is a useful way of examining many of the body's internal organs, including but not limited to the:

  • heart and blood vessels, including the abdominal aorta and its major branches
  • liver
  • gallbladder
  • spleen
  • pancreas
  • kidneys
  • bladder
  • uterus, ovaries, and unborn child (fetus) in pregnant patients
  • eyes
  • thyroid and parathyroid glands
  • scrotum (testicles)