Professional
Technical
IVT
multileaf collimator
Pronunciation: MUHL-tee-leef kuh-LIM-ay-tor
Device with multiple moveable tungsten leaves that shapes radiation beams to conform to target volumes.
Full Definition
A multileaf collimator is a beam-shaping device consisting of many individually controlled tungsten leaves that can move independently to create complex field shapes. This technology enables precise conforming of radiation beams to irregular target volumes while minimizing exposure to surrounding normal tissues. MLCs are essential components of modern linear accelerators and enable advanced techniques like IMRT and VMAT.
Usage
Usage note: Commonly abbreviated as MLC; individual components are called 'leaves' not 'leafs'.
In Context
- "The multileaf collimator was programmed to create the optimized beam apertures." — Treatment delivery specification
- "Daily quality assurance includes verification of multileaf collimator positioning accuracy." — QA protocol
Also known as
MLC
Contrasted with
fixed collimators
blocks
Don't confuse with
jaw collimators
beam modifiers