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Thread: MLC blocking

  1. #1
    Join Date
    Apr 2007

    Question MLC blocking

    AAPC: Back to School
    What is this & how does it fit into radiation oncology?

    Thanks for any help!!

  2. #2
    Join Date
    Apr 2007

    Default RE: MLC Blocking

    "MLC blocking" is shorthand for Multi-Leaf Collimation blocking. Many linear accelerators (the radiation treatment delivery system) have the ability to shape the radiation beam in the pattern the physician designs by a multi-leaf collimator housed in the head of the unit.

    COding radiation field designs using a MLC is a little tricky - as it is the design itself that defines the complexity of the treatment device (CPT 77332, 77333, 77334) and not the use of the MLC itself.

    Do a Google search by multi-leaf collimator - you'll get hits that will show you exactly what it looks like.
    Last edited by hodgeskm; 12-15-2008 at 08:29 PM.

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