International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1395
7
1
gregorian
2016
10
1
14
4
online
1
fulltext
en
Optimisation of the MAGAT gel dosimeter compositions
Radiation Biology
Radiation Biology
گزارش کوتاه
Short Report
<p></p>
<p>Background: An effective polymer gel dosimeter can be fabricated by varying the composition of its chemical components. Materials and Methods: The MAGAT gel dosimeter formulations that used different compositions of Methacrylic acid (MAA) and gelatin were extensively investigated in the present study according to the R2–dose response and R2–dose sensitivity. The irradiation of MAGAT gel was performed by 6-MV photon beam at a dose range 1 to 10 Gy and was imaged by 1.5T Magnetic Resonance Imaging (MRI). The dose response of MAGAT gel dosimeter was obtained from spin-spin relaxation rate (R2) of MRI signal. Results: The MAGAT gel dosimeter composed of 5% gelatin and 6% MAA gave the highest sensitivity (1.1180 s<sup>-1</sup>Gy<sup>-1</sup>). Conclusion: Understanding the effects of the compositional changes will help to clarify the mechanisms involved in the dose response of the MAGAT gel dosimeter. </p>
<p></p>
Keywords: MAGAT gel dosimeter, spin-spin relaxation rate (R2), dose response, MRI imaging.
305
311
http://ijrr.com/browse.php?a_code=A-10-1-633&slc_lang=en&sid=1
N.N.A
Razak
790031947532846009973
790031947532846009973
Yes
School of Physics, University Sains Malaysia, 18000, Pulau Pinang, Malaysia
A.A.
Rahman
790031947532846009974
790031947532846009974
No
1School of Physics, University Sains Malaysia, 18000, Pulau Pinang, Malaysia
S.
Kandaiya
790031947532846009975
790031947532846009975
No
1School of Physics, University Sains Malaysia, 18000, Pulau Pinang, Malaysia
I.S.
Mustafa
790031947532846009976
790031947532846009976
No
1School of Physics, University Sains Malaysia, 18000, Pulau Pinang, Malaysia
A.A.
Mahmoud
790031947532846009977
790031947532846009977
No
1School of Physics, University Sains Malaysia, 18000, Pulau Pinang, Malaysia
N.Z.
Yahaya
790031947532846009978
790031947532846009978
No
School of Distance Education, University Sains Malaysia, 18000, Pulau Pinang, Malaysia