Open AccessOptimisation of the MAGAT gel dosimeter compositions
Author(s) -
Nik Noor Ashikin Nik Ab Razak,
Azimah Abd Rahman,
S. Kandaiya,
Iskandar Shahrim Mustafa,
Aya Allah Ahmed Mahmoud,
Nor Zakiah Yahaya
Publication year - 2016
Publication title -
internatuinal journal of radiation research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.255
H-Index - 18
eISSN - 2345-4229
pISSN - 2322-3243
DOI - 10.18869/acadpub.ijrr.14.4.305
Subject(s) - dosimeter , materials science , gelatin , biomedical engineering , dosimetry , methacrylic acid , nuclear magnetic resonance , nuclear medicine , polymer , chemistry , medicine , composite material , physics , biochemistry , monomer
Background: An effec ve polymer gel dosimeter can be fabricated by varying the composi on of its chemical components. Materials and Methods: The MAGAT gel dosimeter formula ons that used different composi ons of Methacrylic acid (MAA) and gela n were extensively inves gated in the present study according to the R2–dose response and R2–dose sensi vity. The irradia on of MAGAT gel was performed by 6-MV photon beam at a dose range 1 to 10 Gy and was imaged by 1.5T Magne c Resonance Imaging (MRI). The dose response of MAGAT gel dosimeter was obtained from spin-spin relaxa on rate (R2) of MRI signal. Results: The MAGAT gel dosimeter composed of 5% gela n and 6% MAA gave the highest sensi vity (1.1180 s -1 Gy -1 ). Conclusion: Understanding the effects of the composi onal changes will help to clarify the mechanisms involved in the dose response of the MAGAT gel dosimeter.
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