Investigation and analysis of ferrous sulfate polyvinyl alcohol (PVA) gel dosimeter
- 12 November 2002
- journal article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 47 (23), 4233-4246
- https://doi.org/10.1088/0031-9155/47/23/309
Abstract
Ferrous sulfate (Fe(SO4)2) PVA gels were investigated for a range of absorbed doses up to 20 Gy using both magnetic resonance imaging (MRI) and spectrophotometry to determine R1 and optical density (OD) dose responses and G values. It was found that R1- and OD-dose sensitivities increased with O2 saturation or by the introduction of a freeze-thaw cycle during preparation of the PVA gel. The storage temperature of the Fe(SO4)2 PVA gel at -18 degrees C increased R1-dose sensitivity above that of gels stored at 5 degrees C. The addition of sucrose to the formulation was found to result in the largest increase in both R1- and OD-dose sensitivities. Fe(SO4)2 PVA gel with and without the addition of xylenol orange was demonstrated to have a G value of approximately 20 ions/100 eV and with sucrose approximately 24 ions/100 eV.This publication has 28 references indexed in Scilit:
- Experimental determination of the diffusion coefficient in two-dimensions in ferrous sulphate gels using the finite element methodAustralasian Physics & Engineering Sciences in Medicine, 2001
- Polyvinyl alcohol-Fricke hydrogel and cryogel: two new gel dosimetry systems with low Fe3+diffusionPhysics in Medicine & Biology, 2000
- Three-dimensional radiation dose measurements with Ferrous Benzoic Acid Xylenol Orange in Gelatin gel and optical absorption tomographyNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1999
- Multiple-site fast exchange model for spin-lattice relaxation in the Fricke-gelatin dosimeterMedical Physics, 1997
- Polyvinyl alcohol cryogel: An ideal phantom material for MR studies of arterial flow and elasticityMagnetic Resonance in Medicine, 1997
- Diffusion in Fe(II/III) radiation dosimetry gels measured by magnetic resonance imagingPhysics in Medicine & Biology, 1995
- Imaging of radiation dose by visible color development in ferrous‐agarose‐xylenol orange gelsMedical Physics, 1991
- Radiation dosimetry using nuclear magnetic resonance: an introductory reviewPhysics in Medicine & Biology, 1990
- Radiation chemical and magnetic resonance studies of aqueous agarose gels containing ferrous ionsInternational Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry, 1988
- Gel Dosimeter for Depth-Dose MeasurementsReview of Scientific Instruments, 1957