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Radiology, Vol 127, 828-830, Copyright © 1978 by Radiological Society of North America

ARTICLES

Improved technique for obtaining teletherapy portal radiographs with high-energy photons

BM Galkin, RK Wu and N Suntharalingam

H & D curves were obtained for various film/screen combinations exposed to 60Co, 4-MV, and 45-MV photons. Data indicate that contrast is enhanced more by light-emitting screens than by lead screens or direct exposure. Flexible film cassettes are more comfortable for the patient, and extra-large film can be used for larger patients.




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