step wedge


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step wedge

A quality control device consisting of increasing thicknesses of absorber through which radiographs are taken to determine the amounts of radiation reaching the film.
See also: wedge

step wedge

(step wej)
Triangular aluminum device placed over a radiographic film during exposure to determine the penetrating ability of an x-ray beam.
Synonym(s): penetrometer.
References in periodicals archive ?
The tests indicated that the thirty-gauge wire from a standard step wedge can be readily detected at the eighth step with an x-ray unit producing ninety-five keV.
1) and combinations step wedge rotating disc measuring accuracy timer for radiographic equipment (1 Unit)
The Marshals Service uses a test object devised by the American Society of Testing Materials (ASTM) called a step wedge.