PERTANIKA JOURNAL OF SOCIAL SCIENCES AND HUMANITIES

 

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Dose Distribution of 192Ir HDR Brachytherapy Source Measurement using Gafchromic® EBT3 Film Dosimeter and TLD-100H

Nor Shazleen Ab Shukor, Marianie Musarudin, Reduan Abdullah and Mohd Zahri Abdul Aziz

Pertanika Journal of Social Science and Humanities, Volume 30, Issue 1, January 2022

DOI: https://doi.org/10.47836/pjst.30.1.37

Keywords: 192Ir brachytherapy source, dose distribution, Gafchromic® EBT3 film dosimeter, Monte Carlo simulation, TLD-100H dosimeter

Published on: 10 January 2022

This study aims to measure the radial dose function and anisotropy function F(r, θ) of high Dose Rate (HDR) 192Ir source in a fabricated water-equivalent phantom using Gafchromic® EBT3 film and TLD-100H and to compare the results obtained with the MCNP5 calculated values. The phantom was fabricated using Perspex PMMA material. For, the EBT3 films with a required dimension and TLD-100H chips were placed at r=1, 2, 3, 5, and 10 cm from the source. The F(r, θ) measurements were carried out at r=1, 2, 3, 5, and 10 cm with the angle range from 10° to 170°. The result of from EBT3 film and TLD-100H was in good agreement (2.10%±1.99). Compared to MCNP5, the differences are within 0.31% to 11.47% for EBT3 film and 0.08% to 10.58% for TLD-100H. For the F(r, θ), an average deviation with the MCNP5 calculation is 4.94%±2.7. For both and F(r, θ), the effects are prominent at r=10 cm. At this distance, the response of both Gafchromic® EBT3 film and TLD-100H shows less sensitivity as the dose followed the inverse square law. This work demonstrates that Gafchromic® EBT3 film dosimeter and TLD-100H are suitable dosimeters in 192Ir dosimetric measurements at a radial distance of ˂5 cm

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ISSN 0128-7702

e-ISSN 2231-8534

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JST-3006-2021

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