In the frame of the project Central Nervous System Imaging, researchers of Atomki developed the MiniPET-3 small animal PET scanner in collaboration with University of Debrecen and international partners. In the detectors forming a ring, the traditional photomultipliers are replaced with silicon based photomultipliers. The latter is insensitive to the magnetic field so enables the fusion of PET and MRI imagers. The other great result of this project is the BrainMOD software which can combine and visualize data coming from various medical diagnostic equipments (PET, SPECT, MRI, EEG, EIT) graphically and user-friendly.