What radiation source does CT produce and what radiation source does X-ray machine produce?

Radioactive source: refers to the solid radioactive substances that are permanently sealed in containers or tightly coated except those in the nuclear fuel cycle of research reactors and power reactors. X-ray equipment: X-ray machines, accelerators, neutron generators and radioactive equipment. PET/CT (positron emission computed tomography) uses positron emission nuclides (such as18f.11c.13n.15o. ) or its labeling substance (such as 18F- deoxyglucose for short). The energy of X-rays is generally tens to hundreds of kilo-electron volts, and the chest fluoroscopy irradiates about 0.02 millisieverts (mSV) at a time, which is about one fiftieth of the public life value stipulated by the state. However, the radiation dose received by patients during radiography is much lower than that during fluoroscopy, and they mainly contain radioactive wastes (sources), such as 192ir.35s,125i.32p.14c.137cs.60co.90sr. 56638.6866666667