Abstract
The technique of photon activation analysis (PAA) is widely employed in many fields as an effective non-invasive tool for measuring elemental compositions and concentrations. In recent years there has been a revival and growing interest of PAA in general and for medical applications in particular. The feasibility of using a PET scanner (Ecat Exact 931) to determine nitrogen concentration in a dead rabbit is described. This method is based on the photon activation of N-14(gamma,n)N-13 (T-1/ 2 = 9.9 min) using an 18 MV photon beam Medical Linear Accelerator (Varian 2300EX).