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a device, such as a wedge of aluminum, clay, or plastic, that is placed over a body area during radiography to compensate for differences in radiopacity. For example, a wedge may be placed over a foot with the thick portion over the toes and the thin edge toward the heel to compensate for the range of thickness of the foot. See also bowtie filter.
In radiography, a filter that shields less dense areas to produce a more nearly uniform radiographic image.
See also: filter