Decaying source method for scintillation camera resolving times

An earlier paper by the author showed that scintillation camera systems can be described effectively using the resolving times T and tau0 of the dominant nonparalyzable and paralyzable components, that is, the detector system and the computer interface, respectively. When used with a full spectrum window, the camera has a lower nonparalyzable and an upper paralyzable operating range with normalized threshold input rate nt = Nttau0 = ln(1 + kTnt), where kT = T/tau0. Correct determination of T and tau0 requires that both r12 and r in the normalized two-source equations kT = (2/r12-1/r) and k0 = (r12/2r2)ln(2r/r12) come from the nonparalyzable (n<=nt) and paralyzable (n >= n(t)) ranges, respectively.