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You are here : AllRefer.com > Health > Tests & Exams > Ultrasound

Ultrasound

Alternate Names : Sonogram


Definition

Ultrasound involves the use of high-frequency sound waves to create images of organs and systems within the body.

Why is the Test Performed?

The reason for the examination will depend on your symptoms.

How is the Test Performed?

An ultrasound machine creates images that allow various organs in the body to be examined. The machine sends out high-frequency sound waves, which reflect off body structures. A computer receives these reflected waves and uses them to create a picture. Unlike with an x-ray or CT scan, there is no ionizing radiation exposure with this test.

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 handheld probe called a transducer is 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 will the Test Feel?

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

Pictures & Images

Abdominal ultrasound
Abdominal ultrasound

Ultrasound in pregnancy
Ultrasound in pregnancy

17 week ultrasound
17 week ultrasound

30 week ultrasound
30 week ultrasound

Carotid duplex
Carotid duplex

Ultrasound comparison
Ultrasound comparison

Thyroid ultrasound
Thyroid ultrasound

Ultrasound
Ultrasound

Ultrasound, normal fetus- ventricles of brain
Ultrasound, normal fetus- ventricles of brain

 
      See all Pictures & Images



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Review Date : 3/27/2009
Reviewed By : A.D.A.M. Editorial Team: David Zieve, MD, MHA, Greg Juhn, MTPW, David R. Eltz. Previously reviewed by David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine (10/29/2008).



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