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Radiology, Vol 128, 235-243, Copyright © 1978 by Radiological Society of North America

ARTICLES

A gradient method of optimizing external-beam radiotherapy treatment plans

RE Cooper

Although a number of methods of treatment optimization by computer have ben proposed, they have received little support. In this paper, an alternative approach is proposed based on the differentials of a treatment evaluation function with respect to wedge angle, incidence angle, entry point, and field weighting. The technique may be used in a batch-oriented computer system, or, by means of a conversational terminal, the therapist can plan a treatment with guidance from the program. Although it can be used to find global optima by a search process, it operates best as a method of improving partially- satisfactory treatments.




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Copyright © 1978 by the Radiological Society of North America.