Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

Dosimetry of small photon fields in the presence of bone heterogeneity using MAGIC polymer gel, Gafchromic film, and Monte Carlo simulation

Mon May 27 07:57:34 2024

(2022) Dosimetry of small photon fields in the presence of bone heterogeneity using MAGIC polymer gel, Gafchromic film, and Monte Carlo simulation. Reports of Practical Oncology and Radiotherapy. pp. 226-234. ISSN 1507-1367

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Abstract

Background: The presence of heterogeneity within the radiation field increases the challenges of small field dosimetry. In this study, the performance of MAGIC polymer gel was evaluated in the dosimetry of small fields beyond bone heterogeneity. Materials and methods: Circular field sizes of 5, 10, 20 and 30 mm were used and Polytetrafluoroethylene with density of 2.2 g/cm(3) was used as the bone equivalent material. The PDD curves, beam profiles, and penumbra widths were measured using MAGIC polymer gel, EBT2 film, and Monte Carlo simulation. Results: The maximum differences between MAGIC and EBT2 are 6.1, 4.7, 2.4, and 2.2 for PDD curves at 5, 10, 20, and 30 mm circular fields, respectively. The dose differences and distance to agreement between MAGIC and MC were within 1.89/0.46 mm, 1.66/0.43 mm, 1.28/0.77 mm, and 1.31/0.81 mm for beam profile values behind bone heterogeneity at 5, 10, 20, and 30 mm field sizes, respectively. Conclusion: The results presented that the MAGIC polymer gel dosimeter is a proper instrument for dosimetry beyond high density heterogeneity.

Item Type: Article
Creators:
CreatorsEmail
Parwaie, W.UNSPECIFIED
Geraily, G.UNSPECIFIED
Mehri-Kakavand, G.UNSPECIFIED
Babaloui, S.UNSPECIFIED
Rezvani, S.UNSPECIFIED
Pursamimi, M.UNSPECIFIED
Keywords: small field bone heterogeneity MAGIC polymer gel Monte Carlo simulation modulated radiation-therapy diamond detector xylenol gel thermoluminescent accuracy chamber system Oncology Radiology, Nuclear Medicine & Medical Imaging
Divisions:
Page Range: pp. 226-234
Journal or Publication Title: Reports of Practical Oncology and Radiotherapy
Journal Index: ISI
Volume: 27
Number: 2
Identification Number: https://doi.org/10.5603/RPOR.a2022.0031
ISSN: 1507-1367
Depositing User: مهندس مهدی شریفی
URI: http://eprints.medilam.ac.ir/id/eprint/4018

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