Characterization of ferrous-methylthymol blue-polyvinyl alcohol gel dosimeters using nuclear magnetic resonance and optical techniques

被引：39
作者：
Rabaeh, Khalid A. [1 ]
Eyadeh, Molham M. [2 ]
Hailat, Tariq F. [3 ]
Aldweri, Feras M. [4 ]
Alheet, Samer M. [5 ]
Eid, Rania M. [6 ]
机构：
[1] Hashemite Univ, Med Imaging Dept, Fac Allied Hlth Sci, Zarqa, Jordan
[2] Yarmouk Univ, Phys Dept, Fac Sci, Irbid 21163, Jordan
[3] Minist Educ, Amman, Jordan
[4] Hashemite Univ, Phys Dept, Fac Sci, Zarqa, Jordan
[5] King Hussein Canc Ctr, Radiotherapy Dept, Amman, Jordan
[6] AL Basher Hosp, Radiotherapy Dept, Amman, Jordan
来源：
RADIATION PHYSICS AND CHEMISTRY | 2018年 / 148卷
关键词：
Fricke gels; Methylthymol blue dye; Polyvinyl alcohol; Radiation dosimetry; Nuclear magnetic resonance; Spectrophotometry; DOSE DISTRIBUTIONS; POLYMER GEL; DIFFUSION; GELATIN; SENSITIVITY; STABILITY; CRYOGEL;
D O I：
10.1016/j.radphyschem.2018.02.019
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A new composition of Ferrous sulphate-Metheylthymol blue (MTB)-Polyvinyl alcohol (PVA) dosimeter is introduced in this work and evaluated using nuclear magnetic resonance (NMR) and absorbance spectro-photometry techniques. The Fricke-MTB-PVA dosimeters were irradiated using a medical linear accelerator in a cubic water phantom. The dose response of the dosimeters was investigated using NMR in terms of spin-spin relaxation rate (R-2), and ultraviolet and visible regions (UV-Vis) spectrophotometry in terms of absorbance. The dosimeter presents a linear dose response for doses up to 20 Gy with UV-Vis and 40 Gy with NMR method. The sample with 0.1 mM MTB, 5% PVA by weight showed highest dose sensitivity for both techniques. The Fricke-MTB-PVA dosimeter developed in this work has a significant advance over the Fricke -MTB-gelatin system: the NMR sensitivity was remarkably improved; the auto-oxidation rate was seven times lower, and no significant dose rate or photon energy effects were observed.
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页码：25 / 32
页数：8
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