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British Journal of Radiology (1979) 52, 880-887
© 1979 British Institute of Radiology
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The British Journal of Radiology, Vol 52, Issue 623 880-887, Copyright © 1979 by British Institute of Radiology

ARTICLES

Contrast enhancement of high-energy radiotherapy films

LE Reinstein and CG Orton

An order-of-magnitude improvment in the contrast of high-energy localization and verification films has been achieved through the application of a simple, inexpensive, contrast enhancement technique. The method involves making reversal contact "prints" of the original film onto ordinary X-ray fi-m with equipment commonly available in any radiotherapy department. This results in "gamma multiplication". The theory as well as several applications of this effect are presented.




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