[Comparison of FBP and ML-EM reconstruction used by simulation data; effect of the projection number for the SPECT image].

Purpose: The influence of the numbers of projection of SPECT exerting on a re-constructed image cannot be strictly evaluated by phantom studies. Therefore, we compared re-constructed images of the FBP method and the ML-EM method by using simulation data.

Methods: Simulation data was entered in the image processing software, and the projection data that changed the numbers of projection was made.