is the test?
- Ultrasound uses sound waves instead of radiation to
generate snapshots or moving pictures of structures
inside the body. This imaging technique works in a
manner similar to radar and sonar, developed in
World War II to detect airplanes, missiles, and
submarines that were otherwise invisible. After coating
your skin with a lubricant to reduce friction, a radiologist
or ultrasound technician places an ultrasound transducer,
which looks like a microphone, on your skin and may
rub it back and forth to get the right view. The transducer
sends sound waves into your body and picks up the
echoes of the sound waves as they bounce off internal
organs and tissue. A computer transforms these echoes
into an image that is displayed on a monitor.
Using an abdominal ultrasound, a doctor can detect
gallstones, check the liver for cancers, examine the
kidneys for cancers or for blockages in the flow of
urine, measure the size of the spleen or the width of
the aorta (the body’s largest artery), and look for fluid
around the abdominal organs.