Tungsten alloy shielding is an important protective part on radiotherapy equipment. It has been reported that tungsten alloy shield has high density (~18.8g/cm3), excellent X-ray and gamma-ray absorption capabilities, and good workability. Therefore, it is an ideal protective component in cobalt-60 treatment machine, medical electron linear accelerator and other radiotherapy equipment, to provide excellent radiation protection and beam guidance.
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The cobalt-60 treatment machine is a long-distance radiotherapy device with gamma source. Cobalt-60 is used as a radioactive source to kill cancer cells with gamma rays, so as to achieve the purpose of treating cancer without surgery. The shield on the cobalt-60 treatment machine may be a collimator made of W-Ni-Fe alloy.
Medical electron linear accelerators use microwave electric fields to accelerate electrons to generate high-energy rays (X radiation and/or electron radiation beams) for long-distance external radiation therapy. They are widely used in the treatment of various tumors, especially deep tumors. The shield on the linear accelerator may be multi-leaf composed of many leaf-shaped tungsten alloy parts.
In a word, tungsten alloy shielding is an ideal radiation protection measure in radiotherapy equipment.
