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KMID : 1164220040160010021
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Journal of Korean Society for Radiotherapeutic Technology
2004 Volume.16 No. 1 p.21 ~ p.27
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The Activity Check of Brachytherapy Isotope
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Kim Gun-Oh
Lee Byoung-Gu
Kweon Young-Ho
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Abstract
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An isotope Ir-192, which is used in brachytherapy depends on import in whole quantities. There are a few ways for its activity. measurement using Welltype chamber or the way to rely on authentic decay table of manufacturer. In-air dosimetry using Farmer Chamber, etc. In this paper, let me introduce the way using Farmer chamber which is easier and simple. With the Farmer chamber and source calibration jig, take a measurement the activity of an isotope Ir-192 and compare the value with the value from decay table of manufacturer and check the activity of source. The result of measurement, compared the value from decay table, by . (which belongs to recommendable value for AAPM as difference of error range) It is possible to use on clinical medicine. With the increase in use of brachytherapy, the increase of import is essential. And an accurate activity check of source is compulsory. For the activity check of source, it was possible to use Farmer chamber and source calibration jig without additional purchase of Well type chamber.
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