The structure and technical indices of PET scanner (PET-B01) are described. It is applied to do the clinical research work by using the positron ⁶⁸Ga-citrate and ⁶⁸Ga~BAT-TECH in 34 human bodies. All of them have not any symptoms or signs of chemical toxicity and radioactive hazard. ⁶⁸Ga-citrate PET images can be applied to make differential diagnosis on hepatoma or lung cancer, among 28 cases, the coincidence rate is 0.927; can confirm that the malignant tumor is encapsulated or divergent.