![]() For intensity modulated treatments the leaves of a MLC can be moved across the field to create IMRT distributions (MLCs really provide a fluence modulation rather than intensity modulation). For conformal radiotherapy the MLC allows conformal shaping of the beam to match the borders of the target tumour. ![]() MLCs were primarily used for conformal radiotherapy, and have allowed the cost-effective implementation of conformal treatment with significant time saving, and also have been adapted for use for IMRT treatments. MLCs are now widely used and have become an integral part of any radiotherapy department. The MLC has improved rapidly since its inception and the first use of leaves to shape structures in 1965 to modern day operation and use. Specifically, conformal radiotherapy and Intensity Modulated Radiation Therapy (IMRT) can be delivered using MLCs. MLCs are used in external beam radiotherapy to provide conformal shaping of beams. Wikipedia 0.0 / 0 votes Rate this definition:Ī multileaf collimator (MLC) is a Collimator or beam-limiting device that is made of individual "leaves" of a high atomic numbered material, usually tungsten, that can move independently in and out of the path of a radiotherapy beam in order to shape it and vary its intensity. ![]()
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