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1 School of Dentistry, University of Michigan, Ann Arbor, Michigan
The design of a lead-walled pinhole camera, equipped with both photographic and radiographic films, was presented. The factors that controlled times of exposure and size and sharpness of the image were described mathematically. Photographs and radiographs that were produced simultaneously of dental subjects illustrated the usefulness of this new tool in radiation research in dentistry.
[see figure in the PDF file] Submitted on April 6, 1961
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