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Preliminary epi-diode characterization for HDR brachytherapy quality assurance

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posted on 2024-11-16, 04:40 authored by Anna Romanyukha, Mauro Carrara, Dean CutajarDean Cutajar, Marco PetaseccaMarco Petasecca, Iolanda FuduliIolanda Fuduli, Tebarak Al-Salmani, Michael LerchMichael Lerch, Vladimir Perevertaylo, Davide Mazzeo, Annamaria Cerrotta, Carlo Fallai, Emanuele Pignoli, Anatoly RozenfeldAnatoly Rozenfeld
High Dose Rate vaginal brachytherapy for endometrial cancer has evolved from simple single-channel (i.e. cylindrical applicator) deliveries to treatments involving several channels (i.e. multichannel applicator) for the radiotherapy source to dwell, increasing the complexity of the dose distribution, and allowing more space for potential errors. For this reason real-time treatment verification has gained a greater importance than ever before, and more methods need to be developed in order to provide assurance that the dose delivery has been carried out as intended by the hospital staff. P-type silicon epi diodes have been designed at the Centre for Medical Radiation Physics (CMRP) in Australia to suit the specific needs of HDR BT, and characterized in the clinical BT facility of the Fondazione IRCCS (INT) in Italy. They have shown great potential for BT treatment verification in real time due to their radiation hardness, dose rate independence, flexibility in physical design, and ability to monitor the treatment at a 1-kHz readout frequency. Their dynamic range has been determined as ± 17 to ± 20 mm and dwell time calculation accuracy of > 0.1 s has been shown. If placed on the same longitudinal plane of a treatment accessory, these detectors would enable coverage of about 40 mm for source position and dwell time tracking. Respective detector positioning at (0, +3, -3 mm) would extend this range to 45-50 mm, depending on the catheter location, proving to be sufficient for the majority of treatment cases. Further studies are encouraged to develop diodes with a wider dynamic range.

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Out of Asia: unique insights into human evolution and interactions using frontier technologies in archaeological science

Australian Research Council

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Citation

Romanyukha, A. A., Carrara, M., Cutajar, D., Petasecca, M., Fuduli, I., Al-Salmani, T., Lerch, M., Perevertaylo, V., Mazzeo, D., Cerrotta, A., Fallai, C., Pignoli, E. & Rosenfeld, A. B. (2019). Preliminary epi-diode characterization for HDR brachytherapy quality assurance. Journal of Physics: Conference Series, 1154 (Conference 1), 012026-1-012026-7.

Journal title

Journal of Physics: Conference Series

Volume

1154

Issue

1

Language

English

RIS ID

135136

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