What It Is
An X-ray of the tibia and fibula is a safe and painless test that uses a small
amount of radiation to take a picture of the lower leg. During the examination, an
X-ray machine sends a beam of radiation through the lower leg, and an image is recorded
on a computer or special X-ray film. This image shows the bones (tibia and fibula)
and soft tissues of the lower leg.
The X-ray image is black and white. Dense structures that block the passage of
the X-ray beam through the body, such as the tibia and fibula, appear white on the
X-ray image. Softer body tissues, such as the skin and muscles, allow the X-ray beams
to pass through them and appear darker.
X-rays are performed by an X-ray technician in the radiology department of a hospital,
a freestanding radiology center, or a health care provider's office. Two different
pictures are taken of the lower leg: one from the front (anteroposterior view, or
AP) and one from the side (lateral view).
Why It's Done
An X-ray of the tibia and fibula can help find the cause of common signs and symptoms
such as pain, tenderness, swelling, or deformity of the lower leg. It can detect broken
bones, and after a broken bone has been set, an X-ray can help determine whether the
bones are in proper alignment and whether they have healed properly.
If surgery of the lower leg is required, an X-ray may be taken to plan for the
surgery and, later, to see the results of the operation. Also, an X-ray can help to
diagnose later stages of infections, as well as cysts, tumors, and other diseases
in the bones of the lower leg.
Preparation
An X-ray of the tibia and fibula doesn't require any special preparation. Your
child may be asked to remove some clothing, jewelry, or any metal objects that might
interfere with the X-ray image.
Developing babies are more sensitive to radiation and are at more risk for harm,
so if your daughter is pregnant, inform her doctor and the X-ray technician.