Abstract:The results of leakage tests on approximately 2000 clinical radium sources in current use in several hospitals are presented. The tests were carried out using a liquid scintillation immersion method. Less than 1% of the sources leaked radon gas (222Rn) to an extent greater than 1 nCi/24 h. The consequences of a small leakage of radon from a source while implanted in tissue are considered and compared with the hazards and problems created when sources leak during storage. A leakage rate of 1 nCi/24 h is suggest… Show more
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