Abstract
In this study a complete set of dosimetric data is presented for the high doserate (HDR) source from Amersham used in the Buchler remote afterloading HDRunit. These data have been calculated by means of the Monte Carlo simulationcode GEANT taking into account the detailed geometry of the source. Absolutedose rate distributions in water were calculated around this source and arepresented as conventional 2D Cartesian look-up tables. All dosimetricquantities recommended by the AAPM Task Group 43 report have beencalculated. Quantities determined are: dose rate constant, radial dosefunction, anisotropy function, anisotropy factor and anisotropy constant. Thedose rate distributions of the Buchler HDR source are compared with those ofother HDR sources used in brachytherapy, showing that the differences arelarge in zones near the long source axis due to oblique filtration. TheseMonte Carlo simulated data in water can be used for clinical applications.
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