The dose response of normoxic polymer gel dosimeters measured using X-ray CT

被引：55
|
作者：
Hill, B
Venning, A
Baldock, C
机构：
[1] Canberra Hosp, Biomed Engn Serv, Med Phys Sect, Woden, ACT 2606, Australia
[2] Queensland Univ Technol, Sch Phys & Chem Sci, Brisbane, Qld, Australia
[3] Univ Sydney, Sch Phys, Inst Med Phys, Sydney, NSW 2006, Australia
来源：
BRITISH JOURNAL OF RADIOLOGY | 2005年 / 78卷 / 931期
关键词：
D O I：
10.1259/bjr/46029447
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
X-ray CT was used to determine the dose response of normoxic polymer gel dosimeters. Normoxic polymer gel dosimeters were manufactured and irradiated up to 150 Gy. Up to 50 CT images were acquired oil a Toshiba Aquilion Multislice CT scanner using protocols for 80 kV and 135 kV to determine dose response. HU-dose sensitivity, the linear regression of data for the HU versus dose for the linear part of the curve LIP to 60 Gy was 0.38 +/- 0.07 HU Gy(-1) for 135 kV and 0.37 +/- 0.01 H U Gy(-1) for 80 kV. Dose resolution was found to be < 1.3 Gy for all absorbed dose range up to 70 Gy for 135 kV, similar to that measured previously for polyacrylamide gel (PAG). Although the HU-dose sensitivity was lower than that previously measured for PAG gel dosimeters it had a greater range of absorbed dose indicating that normoxic polymer gel dosimeters have potential in CT gel dosimetry.
引用
收藏
页码：623 / 630
页数：8
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