Dosimetric characteristic of physical wedge versus enhanced dynamic wedge based on Monte Carlo simulations

Seied Rabie Mahdavi; Ghazale Geraily; Ahmad Mostaar; Arman Zia; Golbarg Esmaili; Somayeh Farahani

doi:10.4103/0973-1482.183562

Dosimetric characteristic of physical wedge versus enhanced dynamic wedge based on Monte Carlo simulations

Seied Rabie Mahdavi, Ghazale Geraily, Ahmad Mostaar, Arman Zia, Golbarg Esmaili, Somayeh Farahani

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

4 Downloads (Pure)

Abstract

Aim of Study: Physical wedges (PWs) are widely used in radiotherapy to obtain tilted isodose curves, but they alter beam quality. Dynamic wedges (DWs) using moving collimator overcome this problem, but measuring their beam data is not simple. The main aim of this study is to obtain all dosimetric parameters of DWs produced by Varian 2100CD with Monte Carlo simulation and compare them to those from PWs.

Subjects and Methods: To simulate 6 MV photon beams equipped with PW and DW, BEAMnrc code was used. All dosimetric data were obtained with EDR2 films and two-dimensional diode array detector.

Results: Good agreement between simulated and measured dosimetric data for PW and DW fields was obtained. Our results showed that percentage depth dose and beam profiles at nonwedged direction for DWs are the same as open fields and can be used to each other.

Conclusion: From Monte Carlo simulations, it can be concluded that DWs in spite of PW do not have effect on beam quality and are good options for treatment planning system which cannot consider hardening effect produced by PWs. Furthermore, BEAMnrc is a powerful code to acquire all date required by DWs.

Original language	English
Pages (from-to)	313-317
Number of pages	5
Journal	Journal of Cancer Research and Therapeutics
Volume	13
Issue number	2
DOIs	https://doi.org/10.4103/0973-1482.183562
Publication status	Published - 2017
Externally published	Yes

Bibliographical note

Copyright the Journal of Cancer Research and Therapeutics 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

Enhanced dynamic wedge
Monte Carlo simulations
physical wedge

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10.4103/0973-1482.183562Licence: CC BY-NC-SA

Publisher version (open access)Final published version, 1.42 MBLicence: CC BY-NC-SA

Cite this

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title = "Dosimetric characteristic of physical wedge versus enhanced dynamic wedge based on Monte Carlo simulations",

abstract = "Aim of Study: Physical wedges (PWs) are widely used in radiotherapy to obtain tilted isodose curves, but they alter beam quality. Dynamic wedges (DWs) using moving collimator overcome this problem, but measuring their beam data is not simple. The main aim of this study is to obtain all dosimetric parameters of DWs produced by Varian 2100CD with Monte Carlo simulation and compare them to those from PWs.Subjects and Methods: To simulate 6 MV photon beams equipped with PW and DW, BEAMnrc code was used. All dosimetric data were obtained with EDR2 films and two-dimensional diode array detector.Results: Good agreement between simulated and measured dosimetric data for PW and DW fields was obtained. Our results showed that percentage depth dose and beam profiles at nonwedged direction for DWs are the same as open fields and can be used to each other.Conclusion: From Monte Carlo simulations, it can be concluded that DWs in spite of PW do not have effect on beam quality and are good options for treatment planning system which cannot consider hardening effect produced by PWs. Furthermore, BEAMnrc is a powerful code to acquire all date required by DWs.",

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author = "Mahdavi, {Seied Rabie} and Ghazale Geraily and Ahmad Mostaar and Arman Zia and Golbarg Esmaili and Somayeh Farahani",

note = "Copyright the Journal of Cancer Research and Therapeutics 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2017",

doi = "10.4103/0973-1482.183562",

language = "English",

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T1 - Dosimetric characteristic of physical wedge versus enhanced dynamic wedge based on Monte Carlo simulations

AU - Mahdavi, Seied Rabie

AU - Geraily, Ghazale

AU - Mostaar, Ahmad

AU - Zia, Arman

AU - Esmaili, Golbarg

AU - Farahani, Somayeh

N1 - Copyright the Journal of Cancer Research and Therapeutics 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2017

Y1 - 2017

N2 - Aim of Study: Physical wedges (PWs) are widely used in radiotherapy to obtain tilted isodose curves, but they alter beam quality. Dynamic wedges (DWs) using moving collimator overcome this problem, but measuring their beam data is not simple. The main aim of this study is to obtain all dosimetric parameters of DWs produced by Varian 2100CD with Monte Carlo simulation and compare them to those from PWs.Subjects and Methods: To simulate 6 MV photon beams equipped with PW and DW, BEAMnrc code was used. All dosimetric data were obtained with EDR2 films and two-dimensional diode array detector.Results: Good agreement between simulated and measured dosimetric data for PW and DW fields was obtained. Our results showed that percentage depth dose and beam profiles at nonwedged direction for DWs are the same as open fields and can be used to each other.Conclusion: From Monte Carlo simulations, it can be concluded that DWs in spite of PW do not have effect on beam quality and are good options for treatment planning system which cannot consider hardening effect produced by PWs. Furthermore, BEAMnrc is a powerful code to acquire all date required by DWs.

AB - Aim of Study: Physical wedges (PWs) are widely used in radiotherapy to obtain tilted isodose curves, but they alter beam quality. Dynamic wedges (DWs) using moving collimator overcome this problem, but measuring their beam data is not simple. The main aim of this study is to obtain all dosimetric parameters of DWs produced by Varian 2100CD with Monte Carlo simulation and compare them to those from PWs.Subjects and Methods: To simulate 6 MV photon beams equipped with PW and DW, BEAMnrc code was used. All dosimetric data were obtained with EDR2 films and two-dimensional diode array detector.Results: Good agreement between simulated and measured dosimetric data for PW and DW fields was obtained. Our results showed that percentage depth dose and beam profiles at nonwedged direction for DWs are the same as open fields and can be used to each other.Conclusion: From Monte Carlo simulations, it can be concluded that DWs in spite of PW do not have effect on beam quality and are good options for treatment planning system which cannot consider hardening effect produced by PWs. Furthermore, BEAMnrc is a powerful code to acquire all date required by DWs.

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Dosimetric characteristic of physical wedge versus enhanced dynamic wedge based on Monte Carlo simulations

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