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Dosimetric characteristics of 6 MV modified beams by physical wedges of a siemens linear accelerator

Zabihzadeh, M. and Birgani, M.J.T. and Hoseini-Ghahfarokhi, M. and Arvandi, S. and Hoseini, S.M. and Fadaei, M. (2016) Dosimetric characteristics of 6 MV modified beams by physical wedges of a siemens linear accelerator. Asian Pacific Journal of Cancer Prevention, 17 (4). pp. 1685-1689.

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Abstract

Physical wedges still can be used as missing tissue compensators or filters to alter the shape of isodose curves in a target volume to reach an optimal radiotherapy plan without creating a hotspot. The aim of this study was to investigate the dosimetric properties of physical wedges filters such as off-axis photon fluence, photon spectrum, output factor and half value layer. The photon beam quality of a 6 MV Primus Siemens modified by 150 and 450 physical wedges was studied with BEAMnrc Monte Carlo (MC) code. The calculated present depth dose and dose profile curves for open and wedged photon beam were in good agreement with the measurements. Increase of wedge angle increased the beam hardening and this effect was more pronounced at the heal region. Using such an accurate MC model to determine of wedge factors and implementation of it as a calculation algorithm in the future treatment planning systems is recommended.

Item Type: Article
Additional Information: cited By 0
Subjects: مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 07 Sep 2016 09:01
Last Modified: 07 Sep 2016 09:01
URI: http://eprints.goums.ac.ir/id/eprint/4626

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