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Radiology, Vol 119, 689-695, Copyright © 1976 by Radiological Society of North America

ARTICLES

Evaluation of xeroradiographic image quality

GH Zeman, GU Rao and FA Osterman

A theory of edge enhancement has been developed to describe xeroradiographic images of linear step objects. The theory is shown to give an accurate description of the relationship between edge enhancement, subject contrast, radiation exposure, selenium charging potential and developer bias potential. An optimal transmitted x-ray exposure exists which gives the maximum edge enhancement. For low contrast structures, this same optimal exposure was found to yield the most acceptable images as judged subjectively. This finding has led to the successful application of automatic exposure termination in mammographic examinations using xeroradiography.




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RADIOLOGY RADIOGRAPHICS RSNA JOURNALS ONLINE
Copyright © 1976 by the Radiological Society of North America.