The work investigates the dose-response of EBT3 films in 6MV x-ray beams up to high-dose levels, 90Gy, with a fit function able to provide more precise dose measurements in the whole range by weighing the three RGB (Red-Green-Blue) color channels together, comparing also results with two different scanners. A consistent dose response was observed, no deviation from the known response curves is shown, only some difference in the recorded pixel values was detected using different scanners. The absorbed dose of unknown films was found to be within 1-1.5% of the true absorbed dose, with a precision of about 2.5%.
EP-1770: New RGB algorithm for dose measurements with EBT3 films tested in 6 MV x-ray beams up to 90 Gy doses
Alikaniotis, K.
;Severgnini, M.;Giannini, G.
2018-01-01
Abstract
The work investigates the dose-response of EBT3 films in 6MV x-ray beams up to high-dose levels, 90Gy, with a fit function able to provide more precise dose measurements in the whole range by weighing the three RGB (Red-Green-Blue) color channels together, comparing also results with two different scanners. A consistent dose response was observed, no deviation from the known response curves is shown, only some difference in the recorded pixel values was detected using different scanners. The absorbed dose of unknown films was found to be within 1-1.5% of the true absorbed dose, with a precision of about 2.5%.File in questo prodotto:
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