What is an x-ray machine radioactive source

Radiation source: refers to the research reactors and power reactors in addition to the nuclear fuel cycle category of materials, permanently sealed in containers or a tightly covered and solid radioactive materials. Radiation device: refers to X-ray machines, gas pedals, neutron generators and radioactive devices. PET/CT (Positron Emission Computed Tomography), which uses positron-emitting radionuclides (e.g., 18F.11C.13N.15O.) or their labeled substances (e.g., 18-fluorodeoxyglucose, abbreviated as 18F-DG) to perform a CT imaging examination, which is useful for the early diagnosis of tumors. X-rays have an energy of tens to hundreds of kilo-electron volts, and a chest X-ray is exposed to 0.02 millisieverts (mSV), which is equivalent to about one-fiftieth of the national annual limit for the public. However, the radiation dose received by the patient in the film than the fluoroscopy is much lower, they mainly contain radioactive waste (source) 192Ir.35S,125I.32P.14C.137Cs.60Co.90Sr.3H.241Am and other nuclides.