An extremity x-ray is an image of the hands, wrist, feet, ankle, leg, thigh, forearm humerus or upper arm, hip, shoulder or all of these areas. The term "extremity" often refers to a human limb.
X-rays are a form of radiation that passes through 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
The test is done in a hospital radiology department or in the health care provider's office. The x-ray is done by an x-ray technologist.
You will need to hold still as the x-ray is taken. You may be asked to change position, so more x-rays can be taken.
How to Prepare for the Test
Tell your provider if you are pregnant. Remove all jewelry from the area being imaged.
In general, there is no discomfort. You may be slightly uncomfortable while the leg or arm is put in place for the x-ray.
The x-ray shows normal structures for the age of the person.
There is low-level radiation exposure. X-rays are monitored and regulated to provide the smallest amount of radiation exposure needed to make 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.
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Kim W. Imaging of extremity trauma. In: Torigian DA, Ramchandani P, eds. Radiology Secrets Plus. 4th ed. Philadelphia, PA: Elsevier; 2017:chap 45.
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Review Date 7/5/2022
Updated by: Jason Levy, MD, FSIR, Northside Radiology Associates, Atlanta, GA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.