ESTRO 2024 - Abstract Book

S3190

Physics - Detectors, dose measurement and phantoms

ESTRO 2024

varying from 2cm to 40cm, show a good agreement with respect to other detectors (microdiamond, SRS diode and radiochromic film) and with no need for small field correction factors.

Figure 1: Field Profiles at energy 6X, 0.5x0.5cm 2 (red) and 1x1cm 2 (green) square fields and SSD=90cm.

Figure 2: Percent Depth Dose at energies 6X and 6FFF, 1x1cm 2 square fields and SSD=90cm (red and green) and 100cm (blue).

Conclusion:

ACR has been found to be nearly independent of the beam energy (6 MV and 6FFF) and constant over multiple irradiations, which means that it only needs to be determined when the detector is first used. BP10 detector presents an excellent dose-response constancy, sensitivity, linear response and time resolution. Small field dosimetry results show that BP10, unlike other detectors, needs no small field correction factors down to 0.5x0x5cm 2 fields. This fact