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• W3046819439 endingPage "106439" @default.
• W3046819439 startingPage "106439" @default.
• W3046819439 abstract "Abstract The objective of this work is to demonstrate the potential application of Al2O3:C and Al2O3:C,Mg optically stimulated luminescence (OSL) films for 2D dosimetry in magnetic resonance guided radiotherapy (MRgRT), a modality which combines two dosimetric challenges: small field dosimetry and dosimetry in the presence of a magnetic field. To achieve that, prototype Al2O3:C and Al2O3:C,Mg OSL films produced by Landauer (Glenwood, IL, USA) were characterized using a MRIdian system (ViewRay Inc., Mountain View, California, USA). The system was initially equipped with three 60Co heads on a ring gantry combined with a 0.35 T split-magnet MRI system and later upgraded with a 6 MV Flattening Filter-Free (FFF) linear accelerator, with a fixed dose rate of 600 MU/min. The dosimetric properties of the film material (Al2O3:C) in the magnetic field were first tested by irradiating samples of 7 mm in diameter read using a Riso TL/OSL automated reader for high precision. OSL films (Al2O3:C and Al2O3:C,Mg) were then tested at different doses and for two different intensity modulated radiation therapy (IMRT) treatment plans, for which the gamma analysis was performed using the 2D dose information obtained by readout of the films using a laser-scanning OSL reader. The results using the “point-dosimeter” samples showed deviations 95% with a 3% - 3 mm criteria (>84% with a 2% - 2 mm criteria), with the failure typically happening in the edges of the film, not in the central high dose region. The results did not show any clear influence of the magnetic field and demonstrate the feasibility of Al2O3:C and Al2O3:C,Mg OSL dosimeters for 2D dosimetry in MRgRT." @default.
• W3046819439 created "2020-08-07" @default.
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• W3046819439 date "2020-11-01" @default.
• W3046819439 modified "2023-09-27" @default.
• W3046819439 title "Al2O3:C and Al2O3:C,Mg optically stimulated luminescence 2D dosimetry applied to magnetic resonance guided radiotherapy" @default.
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• W3046819439 doi "https://doi.org/10.1016/j.radmeas.2020.106439" @default.
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