IMRT uses a piece of equipment called a multileaf collimator that attaches to the lens of the linear accelerator.
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New systems involving multileaf collimators ( MLCs ) are used to further shape a beam to localise treatment fields in radiotherapy.
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An enhancement of virtual simulation is "'3-dimensional conformal radiation therapy ( 3DCRT ) "', in which the profile of each radiation beam is shaped to fit the profile of the target from a beam's eye view ( BEV ) using a multileaf collimator ( MLC ) and a variable number of beams.
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By the 1990s CT scans, more powerful computers, improved dose calculation algorithms and Multileaf collimators ( MLCs ) lead to 3D conformal planning ( 3DCRT ), categorised as a Level 2 technique by the European Dynarad consortium . 3DCRT uses MLCs to shape the radiotherapy beam to closely match the shape of a target tumour, reducing the dose to healthy surrounding tissue.
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