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primary controlling factor for the radiographic contrast
allows the tissue to be penetrated

lowest kVp possible

triangular aluminum in device placed on a radiograph during exposure to determine the penetrability ability of an xray beam

thickness of penetrometer

types of contrast

depends on the thickness, density and atomic number of the subject, the radiation energy (kVp), contrast materials and scatter radiation

depends on four factors: film characteristic curve, film density, screen or direct X-ray exposure and film processing.

difference in density of adjacent structures. present with bone and its surrounding soft tissue. controlled by the quality of an xray beam

requires more energy to be penetrated when comparing to tissue that is composed of fat and air

requires greater energy to penetrate than any soft structure in the body

also requires high penetrrability