Abstract
The usage of dosimetry of small fields in radiotherapy to measure radiation dose is difficult because of high-dose gradients, lateral electronic disequilibrium, and detector volume effects. In this study, three dosimeters namely, Markus, Semiflex 3D, and Diode E were tested using the Elekta-accelerator electron beams. The electron beam parameters, penumbra, and output factor were determined using these dosimeters for each field size and energy. According to the results, Diode E and Advanced Markus exhibited the greatest difference in Rq among the electron beam parameters. Furthermore, the greatest difference in penumbra was observed between Diode E and Advanced Markus for the field size of 3 cm2 at 10 MeV. In terms of output factor, three dosimeters exhibited the greatest difference between Diode E and Advanced Markus for the field size of 3 cm2 at 10 MeV. The findings indicate that the Semiflex 3D can be regarded as an appropriate dosimeter for electron small-field dosimetry.
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Acknowledgements
This manuscript is part of a research project No. 1395.45 of the Kashan University of Medical Sciences and research project No. 1232 of the Arak University of Medical Sciences, Iran.
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Bayatiani, M.R., Aliasgharzadeh, A., Seif, F. et al. Comparison of dosimetric parameters of small-field electron beams between Advanced Markus, Semiflex 3D, and Diode E responses. Radiol Phys Technol 13, 296–305 (2020). https://doi.org/10.1007/s12194-020-00577-0
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DOI: https://doi.org/10.1007/s12194-020-00577-0