Tungsten Alloy Invention to Multi-Leaf Collimator

As the properties such as high density and environmental-friendly, tungsten alloy material is usually used to invent a new type of multi-leaf collimator for radiation protection.

Embodiments of the present invention provide a multi leaf collimator (MLC). These embodiments have a plurality of leaves having a length of travel. Each leaf has a proximal end, a distal end, a radio opaque distal blocking portion having a length L and width W, a proximal drive portion having a length L′ and width W′, one or more conductive coils fixed to the proximal drive portion and operatively connected to an electrical current source, where electrical current passing through the conductive coils generates a first magnetic field. The MLC of these embodiments also have a leaf guide with a plurality of channels arranged approximately parallel and adjacent to each other where at least a portion of each of the plurality of leaves is slidingly arranged into each of said channels, and a plurality of stationary magnets positioned adjacent to the proximal drive portion, where each stationary magnet has a second magnetic field configured to operate in conjunction with the first magnetic field from the coils to exert a force on the proximal drive portion. For the high density, we could reduce the size and the volume for the collimator with tungsten alloy material but having the same radiation absorption before.