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Enhancement in 3D dosimetry measurement using polymer gel and MRI


Raba'eh, Khalid Ahmed Majali and Saion, Elias and Omer, Mohammed Ahmed Ali and Mustafa, Iskandar Shahrim and Abdul Rahman, Azhar and Hussain, M. (2008) Enhancement in 3D dosimetry measurement using polymer gel and MRI. Radiation Measurements, 43 (8). pp. 1377-1382. ISSN 1350-4487; ESSN: 1879-0925


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)R2) of water proton. The dosimeters were irradiated with 60Co teletherapy γγ-ray source at a constant dose rate, receiving doses up to 30 Gy. The radiation polymerization occurs and increases with increasing initial dose. R2R2 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: 05 Mar 2014 07:54
Last Modified: 31 May 2019 08:20
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/14515
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