Working Principle of Tungsten Alloy Multi-Leaf Collimator

What is the working principle of tungsten alloy multi-leaf collimator? Let's begin with some pieces of information of multi-leaf collimator. Tungsten alloy multi-leaf collimator, which was developed to replace the traditional lead blocks, are used on linear accelerators to provide conformal shaping of radiotherapy treatment beams. And specifically, conformal radiotherapy and intensity modulated radiation therapy can be delivered using multi-leaf collimators. The multi-leaf collimator has movable tungsten alloy leaves to block some fraction of the radiation beam. Typically, multi-leaf collimators have 52-160 tungsten alloy leaves, arranged in pairs. So, what is the working principle of tungsten alloy multi-leaf collimator?

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Working Principle of Tungsten Alloy Multi-Leaf Collimator

The multiplex motor is used to drive the screw rod to rotate, thereby pushing the tungsten alloy leaves forward or backward, so that the multiple tungsten alloy leaves at the two ends can be enclosed into a figure with the same shape as the tumor site that needs to be irradiated, and thereby X-rays emitted by the medical electron linear accelerator passing through to achieve the purpose of radiotherapy. In other words, tungsten alloy leaves play an important role in shielding X-rays to reduce radiation damage to patients.

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