Pet CT is a kind of imaging examination equipment, which is the most advanced equipment at present.It is a combination of Pet and CT, which uses the same processor to complete the inspection.Pet CT examination has the function of both Pet and CT and achieve the purpose of the 1 + 1 > 2 at the same time.Pet CT examination can check the disease from molecular level to, found small tumor lesions in early. It can be found when patients don't have any symptoms , it is the greatest time for the treatment of patients, half a year earlier than other ordinary inspection found lesions.