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Absorbed dose perturbation caused by diodes for small field photon dosimetry
A S Beddar1, D J Mason, P F O'Brien
1Ontario Cancer Institute/Princess Margaret Hospital, Department of Clinical Physics, Toronto, Canada.
Medical Physics
|July 1, 1994
Abstract:
Uncertainties in dose measurements which may be considered acceptable for standard radiotherapy techniques may not be acceptable for radiosurgery or other precision radiotherapy techniques. One example of this type of uncertainty are the small perturbations to measured dose distributions which are caused by the use of diode detectors. In this article the effect of using diodes to measure small field penumbra is assessed and comments are made about diode orientation and diode construction.