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the difference in x-ray beam intensities across the beam area after emerging from the part being radiographed.
The physical characteristics of an object or imaging technique that influence how the object's image will appear on a radiographical film. The subject contrast of a radiograph can be increased or decreased by increasing or decreasing the kilovoltage peak (kVp). It may also be affected by the thickness, density, and composition of the subject.
See also: contrast
an animal subjected to treatment, observation or experiment.
the difference in relative densities within the subject as distinct from the differences between the subject and the surroundings.