Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)
- Volume 30 Issue 2
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- Pages.147-151
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- 2007
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- 2288-3509(pISSN)
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- 2384-1168(eISSN)
Quality Assurance of Air Kerma Strength for Ir-192 High Dose Rate Source
Ir-192 고선량률 선원에 대한 공기커마강도의 품질보증
- Kim, Jong-Eon (Department of Biomedical Engineering, College of Biomedical Sciences and Engineering, Inje University) ;
- Yoon, Chun-Sil (Department of Physics, College of Natural Science, Gyeongsang National University) ;
- Kim, Sung-Hyun (Department of Physics, College of Natural Science, Chonnam National University)
- Published : 2007.06.30
Abstract
AAPM TG43 report has recommended to measure air kerma strength with the strength of source. Main purpose of this study is to verify the accuracy of air kerma strength provided by manufacturer. Materials for this study were MAX-4001 Electrometer, HDR 1000 Plus of the corporation of standard imaging, and 6 french bronchial Applicator with 1000 mm. we measured ionization current in 10-90 mm range from the bottom of the central axis of chamber. The reference point of calibration displayed by the maximum ionization current in the ionization current curve was measured, and air kerma strength was computed from the maximum ionization current. we acquired 50 mm distance to correspond with the maximum ionization current in the ionization current curve. Its distance has perfectly fitted to the source reference point of calibration certificate of UW-ADCL. Air kerma strength computed value has measured about 0.5% more than calibration value provided by manufacturer. Air kerma strength of calibration certificate provided by manufacturer has acquired reliable results. This study shows that considering the move error of dwell position of source and the dead space length in well-type chamber is a good way to get an accurate result.
AAPM TG43 프로토콜에서 선원 강도의 측정은 공기커마강도로 권고하고 있다. 본 연구는 제조사에서 제공되는 공기커마강도의 정확성이