ABSTRACT
The term dosimetry, as used here, means the methodology of calculating
the dose rate value at a specific point from a source in a given medium,
which is usually water. This enables us to calculate the dose distribution
in the three-dimensional (3D) space around the source. In fact, all available
sources applied in modern brachytherapy have a cylindrical geometry,
and are constructed (core and encapsulation) in such a way that one can
assume a cylindrical symmetry of the dose distribution with respect to their
longitudinal axis.
