Cancer therapy Tungsten Radiation Screening Parts
Cancer treatment of tungsten radiation shielding application
Cancer treatment of tungsten radiation shields is widely used in cancer radiation therapy equipment. There are equipment using cancer treatment of tungsten radiation shielding parts:
Medical electronic straight -line accelerator
Medical multi -page grating
Medical standard
Computer X -rays fracture camera
X -ray treatment machine
Gamma
Principle of cancer treatment of tungsten radiation shielding parts
In the treatment of cancer rays, tungsten alloy leaves with a thickness of 0.1 mm to 1.5 cm are often used to make cancer -based tungsten radiation shielding parts. Cancer treatment of tungsten radiation shields can shoot the ray to the specified treatment area through the movement of tungsten alloy leaves. Taking the working principle of the tungsten alloy multi -page grating as an example. In the tungsten alloy multi -page grating system, the electric motor moves to each tungsten alloy blade in the standard instrument to the correct position. The tungsten alloy blade reaches 120 pages of the polypage grating to shape the tumor outline to reach the millimeter level accuracy. Then, by adjusting the position of the tungsten alloy leaves, the tumor will be exposed to high -energy radiation above the positioning of the tumor. In this process, the tungsten alloy polyaline grid will rotate 360 degrees around the patient with tumors, and the tumor will be ranged by the rays from different directions. In order to protect the surrounding health organizations, high -precision tungsten alloy multi -page grating is necessary.
Why use cancer to treat tungsten radiation shielding parts?
Tungsten alloy is the best material for cancer to treat tungsten radiation stares. Compared with traditional shielding materials, tungsten alloy shielding parts reflect good value. Lead blocks are metal materials used in the field of shielding parts earlier, but during use, it was found that the shielding radiation capacity of the shielded parts made of lead can not be high enough to cause serious pollution to the environment. Compared with the lead shielding parts, the tungsten shielding capacity of the tungsten shield is twice ascetic under the same thickness conditions. The weight of tungsten shields is 25%to 50%less lead. At the same time, lead is toxic materials and tungsten alloy shielding materials are non -toxic. It has no harm to the human body in the treatment of cancer rays.
When the shielding design is performed, the thickness of the shielding material can be calculated according to the total weakening multiple reached by the shielding layer.
Formula: K = E0.693 D / △ 1/2
K: The total weakening multiple of the shielding layer
△ 1/2: The half -value value of the shielding material
D: The thickness of the shielding layer, the unit thickness of the unit is the same as the thickness of the half -value layer. When the thickness thickness of the half -value layer is converted into the thickness of the material, it can be obtained by removing the density of the material.
