Primary and scattering contributions to beta scaled dose point kernels by means of Monte Carlo simulations

M. VALENTE; ET AL.

Porto Alegre

Congreso; 18th International Congress of Medical Physics; 2011

International association of medical physics

Beta nuclides have proved to be appropriate for radioimmunotherapy. Dosimetric performance of each radionuclide has to be carefully investigated and characterized. One usual and practical dosimetric approach is the calculation of dose distribution about a unit point source of any radionuclide of interest, which is known as dose point kernel. Absorbed dose distribution results from the contribution of primary and scattering radiation. This work presents a method capable of performing dose distributions for nuclear medicine dosimetry by means of Monte Carlo methods. Dedicated subroutines have been developed in order to compute separately primary and scattering contributions to the total absorbed dose performing particles transport up to 1keV or least. The suitability of the calculation method has been preliminary tested with monoenergetic sources and further applied to the characterization of different beta-minus radionuclides of nuclear medicine interests for radioimmunotherapy