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A major challenge in brachytherapy dosimetry is the measurement of steep dose gradients. This can be achieved with a high spatial resolution three dimensional (3D) dosimeter. PRESAGE^® is a polyurethane based dosimeter which is suitable for 3D dosimetry. Since an ideal dosimeter is radiologically water equivalent, we have investigated the relative dose response of three different PRESAGE^® formulations, two with a lower chloride and bromide content than original one, for Cs-137 and Ir-192 brachytherapy sources. Doses were calculated using the EGSnrc Monte Carlo package. Our results indicate that PRESAGE^® dosimeters are suitable for relative dose measurement of Cs-137 and Ir-192 brachytherapy sources and the lower halogen content PRESAGE^® dosimeters are more water equivalent than the original formulation.

Item Type:	Refereed Conference Paper
Keywords:	brachytherapy, dose gradients, water equivalency
Research Division:	Physical Sciences
Research Group:	Other Physical Sciences
Research Field:	Medical Physics
Objective Division:	Health
Objective Group:	Other Health
Objective Field:	Health not elsewhere classified
UTAS Author:	Baldock, C (Professor Clive Baldock)
ID Code:	116156
Year Published:	2010
Deposited By:	Research Operations
Deposited On:	2017-05-03
Last Modified:	2017-06-21
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