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[en] A novel MOSFET based dosimeter, the MOSkin, has been developed at the Centre for Medical Radiation Physics, University of Wollongong (Australia). This dosimeter is designed with suitable packaging that allows skin dose measurements at depths of 0.07 mm, as recommended by the ICRP. Initially proposed for real-time skin dose measurement, it is now studied for real-time in vivo dosimetry during high dose rate (Hdr) brachytherapy and intensity modulated radiotherapy. MOSkin detectors have shown good characteristics of reproducibility and linearity. Experiments performed with the 192Ir source of a Hdr brachytherapy facility have shown negligible energy response for photons from the Ir-192 source. The angular response is within the experimental error when used in a dual-MOSkin configuration. In this work, urethral dose measurements were performed in a tissue-equivalent phantom reproducing prostate brachytherapy treatments. The obtained urethral doses were compared to the dose values calculated by the treatment planning system and the discrepancy was found to be within 4%, showing that dual-MOSkin detectors can be profitably utilized for real-time in vivo dosimetry during a brachytherapy treatment. (Author)
Source
Oct 2012; 10 p; Sociedad Mexicana de Irradiacion y Dosimetria; Mexico D. F. (Mexico); 13. International Symposium; 13. Conferencia Internacional; Ocoyoacac, Estado de Mexico (Mexico); 15-19 Oct 2012; 23. National Congress on Solid State Dosimetry; 23. Congreso Nacional sobre Dosimetria de Estado Solido; Ocoyoacac, Estado de Mexico (Mexico); 15-19 Oct 2012; ISBN 978-607-00-6167-7; 