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Enhancements in 3D dosimetry measurement using polymer gel and MRI


Citation

Ahmed Rabaeh, Khalid and Saion, Elias and Ali Omer, Mohammad Ahmed and Shahrim, Iskandar and Alrahman, Azhar A. and Hussain, Muhammad Yousuf (2008) Enhancements in 3D dosimetry measurement using polymer gel and MRI. Radiation Measurements, 43 (8). pp. 1377-1382. ISSN 1350-4487

Abstract / Synopsis

The effects of varying the concentrations of cross-linker N, N-methyelene-bis-acrylamide (BIS) from 2% to 4%, and 2-hydroxyethylacrylate(HEA) monomer from 2% to 4% at 5% gelatin on the dose response of BIS–HEA–gelatin (BHEAG) aqueous polymer gel dosimeters have been studied using magnetic resonance imaging (MRI) for relaxation rate (R2) of water proton. The dosimeters were irradiated with 60Co teletherapy -ray source at a constant dose rate, receiving doses up to 30 Gy. The radiation polymerization occurs and increases with increasing initial dose. R2 is found to decrease mono-exponentially with depth inside the polymer gel and depend strongly upon the initial concentrations of co-monomers (HEA and BIS). Dose–depth map for BHEAG gel was determined for different concentrations of co-monomer (HEA and BIS). The percentage dose depth was also evaluated which leads to a good agreement with the ionization chamber measurements.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1016/j.radmeas.2008.04.083
Publisher: Elsevier
Keywords: Polymer gel, Radiation, Relaxation rate, Depth–dose, Cross-linker
Depositing User: Najwani Amir Sariffudin
Date Deposited: 20 May 2010 01:54
Last Modified: 03 Dec 2015 04:07
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.radmeas.2008.04.083
URI: http://psasir.upm.edu.my/id/eprint/6692
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