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What is an X-ray, and How Is It Done?

From , former About.com Guide

Updated June 04, 2009

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What is an X-ray, and How Is It Done?Photo © A.D.A.M

How an X-ray Works:

When you have an X-ray, electromagnetic radiation is delivered to a certain part (or parts) of your body. The particles from this radiation are then captured on film using special cameras or computer imaging.

Why You Might Have an X-ray:

An X-ray shows bony structures in detail. Your doctor may order an X-ray if he suspects a fracture, arthritis or even bone spurs may be causing your chronic pain. X-rays may also be used to diagnose some types of bone cancer. How your X-ray will be performed depends on what area your doctor wants to take a closer look at.

How an X-ray is Taken:

Some X-rays may be taken as you sit, or you may be required to lie down. If you are having an X-ray of your foot or your hand, taking multiple views is often quick and painless. If your back is being examined, however, your X-ray experience may be a bit more uncomfortable. You may be asked to lie on a table and change positions frequently. You may be asked to wear a hospital gown, especially if your back is being examined. You will also be asked to remove all jewelry as metal may interfere with the scan.

X-ray Safety:

X-rays are generally safe, exposing you to less radiation than when you are in the sun. However, if you are pregnant or suspect you might be pregnant, your doctor may forgo exposing you to X-rays.

Additional Testing:

While X-rays are quick and easy diagnosis tools for bony structures, they do not provide good images of other soft tissues like tendons, ligaments and muscles. Your doctor may order additional tests, such as an MRI or CT scan, in addition to your X-rays.

Source:

Radiology Info. Bone X-ray (Radiography). Accessed 5/29/09. http://www.radiologyinfo.org/en/info.cfm?PG=bonerad

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