Quality Correction for Ir-192 Gamma Rays in Air Kerma Strength Dosimetry Using Cylindrical Ionization Chambers.
- Author:
Dong Hyeok JEONG
1
;
Jhin Kee KIM
;
Ki Hwan KIM
;
Young Kee OH
;
Soo Kon KIM
;
Kang Kyoo LEE
;
Sun Rock MOON
Author Information
1. Department of Radiation Oncology, School of Medicine, Wonkwang University, Iksan, Korea. sunrmoon@wonkwang.ac.kr
- Publication Type:Original Article
- Keywords:
Quality factor;
Ir-192 source;
Air kerma dosimetry
- MeSH:
Gamma Rays;
Reference Values
- From:Korean Journal of Medical Physics
2009;20(1):30-36
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The quality correction in the air kerma dosimetry for Ir-192 using farmer type ionization chambers calibrated by Co-60 quality is required. In this study we determined quality factor (kappa u) of two ionization chambers of PTW-N30001 and N23333 for Ir-192 source using dosimetric method. The quality factors for energy spectrum of microSelectron were determined as kappa u=1.016 and 1.017 for PTW-N30001 and N23333 ionization chambers respectively. We applied quality factors in air kerma dosimetry for microSelectron source and compared with reference values. As a results we found that the differences between reference air kerma rate and measured it with and without quality correction were about -0.5% and -2.0% respectively.
