Tungsten alloy shields for gamma knives include tungsten alloy collimators and their combined blocks. They have smooth surfaces, fine dimensions and reliable quality.
Tungsten Alloy Shield for Gamma Knife
Gamma knife is based on the principle of three-dimensional geometric orientation, which selectively determines the normal tissue or diseased tissue in the skull as the target, and uses the gamma rays produced by cobalt-60 to carry out a large dose of one-time focused irradiation to make it localized The necrosis or functional change of the disease can achieve the purpose of treating the disease. However, ionizing radiation has a damaging effect on the human body, and excessive radiation exposure can cause harm to the human body. Therefore, a safe and reliable protective material-tungsten alloy, is necessary.
Tungsten alloy shields have the advantages of high density, high hardness, and strong ray absorption ability. They are the first choice for radiation shielding. They can be used in both medical and industrial fields. Compared with traditional shielding materials, such as lead, tungsten alloy has better shielding performance.
Tungsten alloy shield structural parts for gamma knife
Advantages of medical tungsten alloy shields
1. Specific gravity: the density is as high as 18.8g/cm3.
2. Strong ray shielding ability: Under the condition of the same thickness, the ray shielding ability of tungsten alloy is more than 1.7 times that of lead, and the stronger the ray, the more obvious the difference between the ray shielding ability of the two.
3. Environmental protection and non-toxic: When tungsten alloy shields are produced and used, they will not harm human health; lead is toxic.
4. High strength: the tensile strength is 700-1000Mpa.
5. It has good shaping, processability and weldability.
6. Large thermal conductivity: thermal conductivity is 5 times that of die steel.
7. Small thermal expansion coefficient: The thermal expansion coefficient is 4-6×10^-6/℃, which is only 1/2-1/3 of iron or steel.