Health Encyclopedia

Extremity x-ray

Definition

X-rays of the extremities are images of the hands, wrists, and feet. X-rays are a form of radiation that penetrate the body to form an image on film. Structures that are dense (such as bone) will appear white, air will be black, and other structures will be shades of gray.

How the test is performed

Extremity x-rays are performed in a hospital radiology department or in the health care provider's office by an x-ray technician. You will be asked to position the extremity to be x-rayed on the table. The pictures are then taken, usually with repositioning of the extremity for different views.

How to prepare for the test

Inform the health care provider if you are pregnant. Remove all jewelry from the area being imaged.

How the test will feel

In general, there is no discomfort, although you may be slightly uncomfortable while the extremity is positioned for the x-ray.

Why the test is performed

Extremity x-ray is used to detect fractures, tumors, or degenerative conditions of the extremity.

Normal Values

The x-ray shows normal structures for the age of the patient.

What abnormal results mean

Abnormal results include fractures, dislocations, bone tumors, degenerative bone conditions, and osteomyelitis (inflammation of the bone caused by an infection).

Additional conditions under which the test may be performed:

Clubfoot
Foreign body detection

What the risks are

There is low-level radiation exposure. X-rays are monitored and regulated to provide the minimum amount of radiation exposure needed to produce the image. Most experts feel that the risk is low compared with the benefits.

Pregnant women and children are more sensitive to the risks of an x-ray.

Review Date:10/23/2006
Reviewed By:Stuart Bentley-Hibbert, M.D., Ph.D., Department of Radiology, Weill Cornell Medical Center, New York, NY. Review provided by VeriMed Healthcare Network.

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