Dual-radiotracer translational SPECT neuroimaging. Comparison of three methods for the simultaneous brain imaging of D and 5-HT receptors.

Purpose: SPECT imaging with two radiotracers at the same time is feasible if two different radioisotopes are employed, given their distinct energy emission spectra. In the case of I and I, dual SPECT imaging is not straightforward: I emits photons at a principal energy emission spectrum of 143.1-179.