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Radiology

X-rays

What are x-rays?

Radiologist

X-rays use invisible electromagnetic energy beams to produce images of internal tissues, bones and organs on film. Standard x-rays are performed for many reasons, including diagnosing tumors or bone injuries.

When the body undergoes x-rays, different parts of the body allow varying amounts of the x-ray beams to pass through. The soft tissues in the body (such as blood, skin, fat, and muscle) allow most of the x-ray to pass through and appear dark gray on the film. A bone or a tumor, which is more dense than the soft tissues, allows few of the x-rays to pass through and appears white on the x-ray. At a break in a bone, the x-ray beam passes through the broken area and appears as a dark line in the white bone.

How are x-rays performed?

X-rays can be performed on an outpatient basis or it may be part of the hospital patient's care.

What is radiation?

Radiation used in radiology causes cells in the body to emit an electrical charge. This electrical charge is detected by the different radiologic techniques and produces an image.

Radiation during pregnancy may lead to birth defects. Always tell your radiologist or physician if you suspect you may be pregnant.

Although each hospital may have specific protocols in place, generally, an x-ray procedure follows this process:

  1. The patient is positioned on an x-ray table that carefully positions the part of the body that is to be x-rayed -- between the x-ray machine and a cassette containing the x-ray film.

  2. Body parts not being imaged may be covered with a lead apron (shield) to avoid exposure to the x-rays.

  3. The x-ray beam is then focused on the area to be photographed.

  4. The patient must be very still or the image will be blurred.

  5. The technician steps behind a protective window and the image is taken.

  6. Sometimes, various x-rays may have to be taken at different angles, such as the front and side view during a chest x-ray.

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