The Journal of the American Dental Association
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J Am Dent Assoc, Vol 111, No 4, 609-612.
© 1985 American Dental Association
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Journal of the American Dental Association, Vol 111, Issue 4, 609-612
Copyright © 1985 by American Dental Association

Journal Article

A special technique to retrieve images from a dark cephalogram



KH Thunthy

A high-density, unreadable cephalogram was made readable by duplicating it at 7 to 10 times the usual ultraviolet light exposure. Soft tissue images were retrieved from a readable cephalogram of normal density by duplicating it at 12 to 20 times the usual ultraviolet light exposure. However, the hard tissue images disappeared in the duplicating process. A correctly made duplicate radiograph had a higher image resolution than the image resolution of the original corresponding high-density radiograph. The difference was not significant clinically.




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