Production Requirements of Tungsten Alloy Multi-leaf Collimator Blade

Improve the tungsten alloy multi-leaf collimator  is mainly shot around the lower leakage and improve conformal reduce transmission penumbra, adapt to the dynamic and dynamic wedge, etc. Function Deployment. Width of the multi-leaf collimator tungsten alloy blades directly determines the irregular wild and planning target volume (PTV) multi-leaf collimator consisting of conformal shape, the thinner the blade, its conformal better. Height tungsten alloy multi-leaf collimator leaves must be able to weaken the original rays and radiation intensity to 5% or less. Due to some radiation leakage between the blades often will reduce the shielding effect of the original radiation leaves, so the blade height to be properly thickened, usually on the thickness of the tungsten alloy selected to be less than 5cm, to be reduced to 2% leak-ray dose below, the thickness of the tungsten alloy needs to 7.5cm.

Longitudinal section of the blade design has two main factors: first, to make solar radiation leakage between adjacent blades and vanes close relative when the minimum, so the blade side tungsten alloy multi-leaf collimator slot to use more bump each other mosaic structure . The blade design of the end face there are generally two types of vertical face and the end face that is curved. Second, a bottom surface and a top surface of the blade to be converged in a plane perpendicular to the direction of movement of the position of the X-ray target, so that the blade cross-section has a trapezoidal structure so that the blades associated with any one of from the source (target) radiated, and with ray parallel to this plane.


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