article · Medical Physics
New silicon carbide detectors have been evaluated for measuring radiation doses delivered by ultra-high dose rate electron beams used in FLASH radiotherapy. Experimental findings show that these devices provide a response that remains independent of the dose rate, even when subjected to extreme instantaneous dose rates and high doses per pulse. Furthermore, a systematic evaluation of detector performance across different voltage biases established that the devices function reliably under ultra-high dose rate conditions even in the absence of an applied voltage. These outcomes highlight the potential of silicon carbide detectors to deliver precise and reliable dose measurements specifically required for FLASH radiotherapy applications.
FLASH radiotherapy delivers ultra-high doses of radiation in fractions of a second, which presents significant challenges for conventional measurement tools. These findings show that silicon carbide detectors can accurately record radiation levels under extreme dose rates, helping ensure that modern, experimental cancer treatments can be measured safely and precisely.
This research provides applied and tested experimental evidence that silicon carbide detectors can serve as reliable dosimeters for ultra-high dose rate electron beams. The technology could be utilised by medical device manufacturers and clinical radiotherapy teams seeking accurate measurement tools for FLASH radiotherapy systems. While laboratory reliability is demonstrated, the abstract does not indicate whether the devices are packaged for clinical workflows or ready for immediate market adoption.
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The results clearly demonstrate that the developed devices exhibit a dose-rate independent response even under extreme instantaneous dose rates and dose per pulse values. A systematic study of the SiC response was also performed as a function of the applied voltage bias, demonstrating the reliability of these dosimeters with UHDR also without any applied voltage. This demonstrates the great potential of SiC detectors for accurate dosimetry in the context of FLASH-RT.
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DOI: 10.1002/mp.17172
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