Unlike most forms of radiation,
x-rays can pass through body tissue, making it possible
to provide images of internal structures without performing
surgery. During the procedure, electromagnetic radiation
passes through the body onto film. Dense structures
such as bone absorb most of the radiation and appear
white on developed film. Structures that are less
dense appear in lighter shades of gray and black.
There is no special preparation
required for most x-rays. Once you arrive, you may
be asked by the technologist to change into a gown
before your examination. You will also be asked to
remove jewelry, eyeglasses, and any metal objects
that may obscure the images. During the procedure
you may be standing up or lying down on an examination
table.
There is little reason to
worry about the small amount of radiation you will
be exposed to when you receive an x-ray. However,
if you are pregnant or suspect that you may be, you
should tell your physician or technologist before
the test is performed, as special precautions may
have to be taken.
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