ESTRO 2024 - Abstract Book

S3280

Physics - Detectors, dose measurement and phantoms

ESTRO 2024

We present dose rate independent 2D passive and real time dosimeters for UHDR dosimetry. Linearity with dose was shown for doses between 3.6 and 12.6 Gy and dose rate independence was shown regardless of the parameter used to vary the dose rate, for dose rates up to 140 Gy/s. The scintillating sheet showed no energy dependence and allowed dose assessment for individual pulses. The profiles of both systems showed high overlap, but a discrepancy with radiochromic film was seen in the penumbra, questioning the use of radiochromic film for out of field dose in UHDR beams. This research received funding from FWO and Medvia.

Keywords: UHDR dosimetry, radioluminescence, 2D dosimetry

References:

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[2] Romano F, et. al. Ultra-high dose rate dosimetry: Challenges and opportunities for FLASH radiation therapy. Med Phys. 2022 Jul;49(7):4912-4932. doi: 10.1002/mp.15649