EVALUATION OF THE DOSIMETRY OF A BRACHYTHERAPY SURFACE MOULD BY IONIZATION CHAMBER AND MONTE CARLO METHODS

摘要

Iridium-192 is the most commonly used radionuclide for brachytherapy treatments. Most treatments involve insertion of the source into the body under full scatter conditions. However the one possible brachytherapy use is the treatment of the epithelium using a surface mould, typically on the head, hand, arm or leg. In these cases, the use of the surface mould allows one to deliver the dose on a curved contour. The treatment planning system assumes full scatter conditions and that all tissues are water equivalent.