Exploring in the calculation of KERMA because of variations of neutron energy in radiotherapy of body tissue

In this research, a real body tissue along with soft tissues which lie in front of it (like adipose and skin) are decomposed into their constituent elements and then are emitted by neutrons in radiotherapy. This study can be applied to all tissues in connection with cancer therapy. The values of neutron KERMA are obtained in the tissue as a result of the collision between neutrons with nuclei of constituent elements of the tissue, and then some interesting results are concluded. The results show that the maximum KERMA occurs within the fast neutron energy range 4-10 MeV and also mono-energy 16 MeV. Besides, inclinations of the KERMA graphs are very alike and bear a resemblance for different elements, and the maximum KERMA arises for elements which have a small atomic weight like hydrogen. Also, most values of KERMA are associated with hydrogen because of the abundance of it.

کلیدواژه ها:

KERMA ، Neutron ، Radiotherapy ، Tissue.