Sign in  |  Register

Illustrated Health Encyclopedia
[an error occurred while processing this directive]

Ency. home > Test > U > Ultrasound

Ultrasound    See images

Overview | Risks | Results

Alternative names:

Sonogram

Definition:

An ultrasound creates images that allow various organs in the body to be examined. The ultrasound machine sends out high-frequency sound waves, which reflect off body structures to create a picture. There is no ionizing radiation exposure with this test.

How the Test is Performed

The test is done in the ultrasound or radiology department. You will be lying down for the procedure. A clear, water-based conducting gel is applied to the skin over the area being examined to help with the transmission of the sound waves. A hand-held probe, called a transducer, is then moved over the area being examined. You may be asked to change position so that other areas can be examined.

For specific information about ultrasound examinations, please refer to the following topics:

How to Prepare for the Test

Preparation for the procedure will depend on the body region being examined.

How the Test will Feel

There is generally little discomfort with ultrasound procedures. The conducting gel may feel slightly cold and wet.

Why the Test is Performed

The reason for the examination will depend on your symptoms.

Ency. home > Test > U > Ultrasound

[an error occurred while processing this directive]