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Radiology, Vol 122, 493-497, Copyright © 1977 by Radiological Society of North America

ARTICLES

Field separation in radiation therapy with opposing fields

L Bianciardi, R Breschi, P Chiaradia, A Josi and P Villa

Dose distribution at the junction of two pairs of opposing fields with 60Co radiation was investigated. In order to obtain a uniform dose distribution, the field separation at the depth of interest was found to be the most important parameter. Values of this parameter to be used in every specific situation are reported. A simple formula is derived, which should be of practical help to the radiotherapist. This formula enables one to compute the field separation at the skin level in order to obtain the best dose distribution in the junction area at the tumor depth.




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RADIOLOGY RADIOGRAPHICS RSNA JOURNALS ONLINE
Copyright © 1977 by the Radiological Society of North America.