Supaporn Srisuwan

PhD Student

Medical Radiations, RMIT University

Focus: FLASH radiotherapy, ultra-high dose rate radiotherapy, Photodisintegration, alanine dosimeter, Presage® dosimeter.

Research Interests

My research project focuses on radiation physics and dosimetry. My academic interests include the development and evaluation of advanced dosimetry techniques to address challenges in modern radiotherapy, such as FLASH radiotherapy, which aims to enhance treatment precision and improve patient outcomes.

Investigation of the effects of ultra-high dose rate "FLASH" on dosimeters' performance active
The main goal of radiotherapy is to increase tumour control while minimizing normal tissue complications for the patient. Many advanced techniques have been developed to achieve this goal. A novel approach, ultra-high dose rate radiotherapy (FLASH-RT), delivers radiation at dose rates greater than 40 Gy/s within sub-seconds. This technique has been shown to reduce normal tissue toxicity while maintaining a tumour response comparable to that of conventional dose rate radiotherapy (approximately 0.03 Gy/s). However, the delivery of such high doses in sub-seconds poses significant dosimetric challenges. Conventional detectors suffer from saturation and ion recombination, leading to substantial errors and uncertainties in dose measurement. My research aims to investigate dosimeters capable of accurately determining radiation doses delivered by ultra-high dose rate beams. One approach involves employing photodisintegration gamma peaks generated by high-energy electrons proposed for FLASH radiotherapy and correlating them with the delivered dose. Another approach is the use of alanine dosimeters. Our results demonstrate that alanine dosimeters exhibit dose-rate independence when irradiated with ultra-high dose rate synchrotron X-ray radiation. In addition, ongoing studies are assessing the response of alanine dosimeters under ultra-high dose rate electron beams.