Multi-leaf collimator includes a plurality
of leaves, a leaf guide configured to support the plurality of leaves, and a
plurality of magnets. Each leaf includes a blocking portion that is radio
opaque, a drive portion connected to the blocking portion, and a coil embedded
in the drive portion. The coil is operatively connected to an electrical
current source to generate a first magnetic field. The first magnetic field
interacts with the magnetic field generated by the magnet to thereby move the
leave to a desired state. The leaves have the capability of moving at speeds of
50 cm/s up to and higher than 1 m/s.
Tungsten alloy material shows as a very suitable
choice for multi-leaf collimator radiation protection. The present invention shows
that the higher responsive to radiation could be acquired through tungsten alloy multi-leaf collimator.
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