ABSTRACT
This chapter sets out the methods by which the dose delivered by brachytherapy sources
can be calculated. It is important that the physicist has a clear appreciation of the theoretical
basis of these calculations so that, whether applying a manual calculation system or using a
computer algorithm, the correction factors that are implicit in the algorithm and those that
must be applied explicitly are fully understood. The issue of dose calculation is considered first
in a generic way, and then the calculation of dose for specific sources will be considered.
