Dosimetric characterization of a 131Cs brachytherapy source by thermoluminescence dosimetry in liquid water.

Dosimetry measurements of a 131Cs brachytherapy source have been performed in liquid water employing thermoluminescence dosimeters. A search of the literature reveals that this is the first time a complete set of dosimetric parameters for a brachytherapy "seed" source has been measured in liquid water. This method avoids the medium correction uncertainties introduced by the use of water-equivalent plastic phantoms.