AIM: To evaluate the stability and reliability of stem cell myocardium transplantation model with positron emission tomography ( PET) and single photon emission computerized tomography ( SPECT). METHODS: Twelve hybrid dogs were randomly divided into two groups. 目的:应用正电子发射断层摄影术(PET)、单光子放射计算机断层显像术(SPECT)评价干细胞心肌移植模型稳定性和可靠性。