A practical method for estimating high-energy X-ray spectra using the iterative perturbation principle proposed by Waggener

被引：14
|
作者：
Iwasaki, A
Matsutani, H
Kubota, M
Fujimori, A
Suzaki, K
Abe, Y
机构：
[1] Hirosaki Univ, Sch Hlth Sci, Hirosaki, Aomori 0368564, Japan
[2] Hirosaki Univ, Sch Med, Dept Radiol, Hirosaki, Aomori 0368562, Japan
[3] Hirosaki Univ Hosp, Dept Radiol, Hirosaki, Aomori 0368563, Japan
来源：
RADIATION PHYSICS AND CHEMISTRY | 2003年 / 67卷 / 02期
关键词：
high-energy X-ray spectra; iterative perturbation technique; transmission analysis; attenuation measurement;
D O I：
10.1016/S0969-806X(03)00012-4
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：
We have remodeled the X-ray spectra estimation method, originally proposed by Waggener et al. (Med. Phys. 26(1999)1269), based on the iterative perturbation technique to minimize differences between measured and calculated transmission curves using low Z attenuators. With our approach, the iterative perturbation cycle is repeated until a reasonable spectrum is obtained. Furthermore, the degree of differences between the measured and calculated transmission curves is also checked using high Z attenuators. The present experimental study, conducted using 4, 10 and 15 MV X-ray beams from a linear accelerator, demonstrated that the spectrum varies strongly with the off-axis distance. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：81 / 91
页数：11
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