a comparison between thermal and x radiography for studying the internal structure of biological

abstract background: with respect to the difference in the interaction of thermal neutron and x rays with matter, using two radiography systems of thermal neutron and x rays will yield highly valuable information for studying the inner structure of biologic samples. methods: the high sensitivity of thermal neutron to hydrogen, in particular, has led to recognizing this system as a useful tool in medical studies in as much to substitute this system as a non-destructive-testing (ndt) technique in the pathology studies for the common microscopic method. results: in this study, by using two neutron and x radiography systems available at the atomic energy organization research center, the inner structure of field mouse bone as a biologic sample was evaluated. conclusion: the difference in the interaction of thermal neutron and x ray with organic and inorganic elements of bone led to development of different images that would supplement each other and we tried to show those differences by presenting the diagram and table obtained by measuring the optic density.