Quality Correction for Ir-192 Gamma Rays in Air Kerma Strength Dosimetry Using Cylindrical Ionization Chambers / 의학물리
Korean Journal of Medical Physics
;
: 30-36, 2009.
Article
in Korean
| WPRIM
| ID: wpr-88370
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Reference Values
/
Gamma Rays
Language:
Korean
Journal:
Korean Journal of Medical Physics
Year:
2009
Type:
Article
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