Ultrasounds are used to create images of the inside of the body with sound waves, most often to help diagnose medical problems and monitor pregnancy.

Common uses

  • Check a baby’s growth, position, heartbeat, and development during pregnancy.
  • Examine organs such as the gallbladder, liver, kidneys, thyroid, pancreas, and spleen.
  • Look at the heart and blood vessels, including blood flow problems or clots.
  • Help find the cause of pain, swelling, lumps, or other symptoms.
  • Distinguish between cysts and solid masses, including breast lumps.
  • Guide needles or other procedures, such as biopsies.

In plain terms

Think of an ultrasound as a real-time camera for soft tissues. Doctors often use it because it is noninvasive, does not use radiation, and can show movement, blood flow, and structure clearly.

Pregnancy and beyond

Pregnancy scans are the most familiar use, but ultrasounds are also common in cardiology, abdominal imaging, breast evaluation, vascular testing, and procedure guidance. Some specialized forms can also assess joints, infant brain and hips, and reproductive organs.

TL;DR

Ultrasounds are mainly used to see inside the body, diagnose conditions, monitor pregnancy, check blood flow, and guide medical procedures.