Water equivalency evaluation of PRESAGE® dosimeters for dosimetry of Cs-137 and Ir-192 brachytherapy sources

Tina Gorjiara, Robin Hill, Zdenka Kuncic, Clive Baldock

Research output: Contribution to journalConference paper

9 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)012093-1-012093-5
Number of pages5
JournalJournal of Physics: Conference Series
Volume250
Issue number1
DOIs
Publication statusPublished - 2010
Externally publishedYes
EventInternational Conference on 3D Radiation Dosimetry (6th : 2010) - Hilton Head Island, SC
Duration: 22 Aug 201026 Aug 2010

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