Radiochromic gel dosemeter for three-dimensional dosimetry

被引:38
作者
Bero, MA [1 ]
Gilboy, WB
Glover, PM
机构
[1] Univ Surrey, Dept Phys, Guildford GU2 5XH, Surrey, England
[2] Atom Energy Commiss Syria, Damascus, Syria
关键词
radiochromic gel dosemeter; three-dimensional dosimetry; Xylenol orange; radiation dose distributions;
D O I
10.1016/S0969-806X(01)00289-4
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 gel dosemeter in which ionising radiation causes a colour change was produced by modifying an existing Fricke gel system. This allows a more convenient preparation procedure and gives a better quality dosimetric system for three-dimensional (3-D) dose measurements. The role of three active components of the Ferrous sulphate Xylenol orange Gelatin (FXG) gel dosemeter is quantified with special consideration of their effect on system sensitivity and stability. The optimal composition was found to be 0.5 mM ferrous sulphate, 0.1 mM xylenol orange and 25 mM sulphuric acid. The dose response is linear in the range 0.1-30 Gy. The FXG sensitivity, derived from the gradient of the dose response curve, was found to be DeltaA = 0.084 cm(-1) Gy(-1), where A is the optical absorption coefficient at a wavelength of 585 nm, with reproducibility and 24 h stability of better than 5%. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:433 / 435
页数:3
相关论文
共 5 条
[1]  
APPLEBY A, 1988, RADIAT PHYS CHEM, V32, P241
[2]   Tissue-equivalent gel for non-invasive spatial radiation dose measurements [J].
Bero, MA ;
Gilboy, WB ;
Glover, PM ;
El-masri, HM .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2000, 166 :820-825
[3]  
BERO MA, 2000, IN PRESS J RADIOL PR
[4]   G(FE-3+) VALUES IN THE FBX DOSIMETER [J].
GUPTA, BL ;
NARAYAN, GR .
PHYSICS IN MEDICINE AND BIOLOGY, 1985, 30 (04) :337-340
[5]   NMR RELAXATION ENHANCEMENT IN GELS POLYMERIZED AND CROSS-LINKED BY IONIZING-RADIATION - A NEW APPROACH TO 3D DOSIMETRY BY MRI [J].
MARYANSKI, MJ ;
GORE, JC ;
KENNAN, RP ;
SCHULZ, RJ .
MAGNETIC RESONANCE IMAGING, 1993, 11 (02) :253-258