The heavy metal pollution due to their industrial production, waste repository or accident as the cyanide spill in river Tisza in 2002, increase the scientific interest for using an ideal trace isotope for monitoring these type of events. Lead is one of the most toxic and commonly used heavy metal, its poisoning is often deadly because very difficult to recognize and identify. The neuro-scientific study of biodegradation effect of lead could be an impressive scientific field of application of 203Pb radioisotope. Furthermore, the targeted radionuclide therapy via-emitting radioisotopes is also of interest and employed tracers such as 213Bi and 212Pb [1,2]. Therefore 203Pb is a potential radioisotope for this role due to its -radiation and as heavy metal element to trace the therapy
