Position Emission Tomography is the most advanced imaging technique which has achieved great diagnosis results in clinic. SPECT/PET system is an alternation of original SPECT from collimator, crystal and photo-electric translator. This imaging system has been a good choice for Positron Emission Tomography in our country mainly because of the high cost of PET. Detail introduction of the system was made from aspects of technique theories, performances and clinical tests. With the appliance of SPECT/PET system...