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Jentashapir Journal of Cellular and Molecular Biology
Official Journal of Ahvaz Jundishapur University of Medical Sciences
Outlines
Isodose 2D determining in water phantom regular and irregular fileds in radiation therapy for caculation modulated dose
Author(s):
Mohamad Javad Tahmasebi Biragani1, Nahid Chegeni2,*, Mansur Zabihzade3, Shole Arvandi4, Sasan Razmjoo Ghalaee4, Fatemeh Seif21Associate professor, Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
2Ph.D Student of Medical Physics,Department of Medical Physics, School of Medicine, Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
3Assistant professor, Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
4Assistant professor , Department of Radiotherapy, Golestan hospital, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
*Corresponding Author: Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. Tel:09163534022, Email: [email protected][email protected]
Published online:Jun 30, 2013
Article type:Research Article
Received:May 19, 2019
Accepted:Jun 30, 2013
How to Cite:Tahmasebi Biragani MJ, Chegeni N, Zabihzade M, Arvandi S, Razmjoo Ghalaee S, et al. Isodose 2D determining in water phantom regular and irregular fileds in radiation therapy for caculation modulated dose. Jentashapir J Cell Mol Biol. 2013;4(3):e94075. doi:
Abstract
Background: The dose distribution plays an importance role in the commercial treatment planning algorithm; therefore, a patient-independent model is needed to calculate the modulated profile.
Methods: A general formula has been proposed to calculate the profiles for any field shape in the wedged and non-wedged, blocked and non-blocked fields under symmetry and asymmetry photon beam conditions. Percentage depth doses (PDDs) are measured for a large number of square fields for both energies, and 45º wedge. Accessing the accuracy of the model for profile prediction, several measurements were carried out for some special treatment fields.
Results: Comparison between measurements and calculation showed that using the γ-index in the range of 3% error in the low dose gradient region and a 3mm isodose shift in the penumbra region.
Conclusion: This analytical approach provides a general fast and accurate algorithm to calculate dose distribution for any treatment field in conventional radiotherapy.
References
- 1.The references are available in PDF file.
Copyright
© 2013, Jentashapir Journal of Cellular and Molecular Biology. This open-access article is available under the Creative Commons Attribution-NonCommercial 4.0 (CC BY-NC 4.0) International License (https://creativecommons.org/licenses/by-nc/4.0/), which allows for the copying and redistribution of the material only for noncommercial purposes, provided that the original work is properly cited.
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