Abstract
Information theory has been applied to the evaluation of optic, photographic and, more recently, radiologic imaging systems. In this investigation, the author has extended this approach to include a number of conventional and unconventional radiographic view boxes. The information capacity, in bits per unit area, of uniform, variable and differentially variable illumination view boxes has been defined and expressed in terms of significant physical parameters. The results have been applied as a measure of quality for two types of standard viewbox. In addition, relationship between the information capacity of view boxes using discrete and continuous light sources were developed and applied as a consideration in the design of differentially illuminated view boxes.
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