Introduction:MicroPET/CT for small animals is currently the most advanced multi-modal imaging device widely used in drug R&D, which can simultaneously achieve both anatomical imaging and functional imaging. This can be used in studies of tumors, cardiovascular and cerebrovascular, Alzheimer's, Parkinson, epilepsy, rheumatism, diabetes, NASH and other major diseases, as well as receptors, genes, stem cells and other cutting-edge research fields, to explore disease mechanisms, develop diagnosis and treatment drugs, and evalsuate treatment effects.