title: Evaluation of a ferrous benzoic xylenol orange transparent PVA cryogel radiochromic dosimeter.
abstract: A stable cryogel dosimeter was prepared using ferrous benzoic xylenol orange (FBX) in a transparent poly-(vinyl alcohol) (PVA) cryogel matrix. Dose response was evaluated for different numbers of freeze-thaw cycles (FTCs), different concentrations of PVA, and ratios of water/dimethyl sulfoxide. Linear relationships between dose and absorbance were obtained in the range of 0-1000 cGy for all formulations. Increasing the concentration of PVA and number of FTCs resulted in increased absorbance and sensitivity. The effects of energy and dose rate were also evaluated. No significant dose rate dependence was observed over the range 1.05 to 6.33 Gy min(-1). No energy response was observed over photon energies of 6, 10, and 18 MV.
authors.affiliation: Department of Medical Physics and Applied Radiation Sciences, McMaster University and Juravinski Cancer Centre, 699 Concession St, Hamilton, ON, L8 V 5C2, Canada.
authors.forename: Molham M
authors.initials: MM
authors.lastname: Eyadeh
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Farrell
authors.forename: Kevin R
authors.initials: KR
authors.lastname: Diamond
mesh_terms: D019817:Benzoic Acid / Q000737:chemistry*; D059985:Cryogels / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D011874:Radiometry / Q000379:methods*; D013454:Sulfoxides / Q000737:chemistry*
chemical_list: D059985:Cryogels; D005296:Ferrous Compounds; D010636:Phenols; D013454:Sulfoxides; C020748:ferrous sulfate; D019817:Benzoic Acid; D011142:Polyvinyl Alcohol; C016833:xylenol orange