In a disclosed imaging method, the instantaneous speed or data acquisition dwell times of a detector head (14, 16) is optimized as a function of position along a path (P) of the detector head around a subject (S, SS, SXL). The optimization is respective to an expected radioactive emission profile (EPROI)...http://www.google.com/patents/US8183532?utm_source=gb-gplus-sharePatent US8183532 - Cardiac SPECT system with trajectory optimization