# Loading the MLC with RT Plan

**URL:** <https://discourse.slicer.org/t/loading-the-mlc-with-rt-plan/7522>\
**Category:** Support\
**Created:** [July 11, 2019, 8:44am UTC](https://discourse.slicer.org/t/loading-the-mlc-with-rt-plan/7522 "2019-07-11T08:44:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![aseman](https://avatars.discourse-cdn.com/v4/letter/a/c0e974/32.png) [@aseman](https://discourse.slicer.org/u/aseman)\
**Post date:** [July 11, 2019, 8:44am UTC](https://discourse.slicer.org/t/loading-the-mlc-with-rt-plan/7522/1 "2019-07-11T08:44:30Z")

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Slicer version:4.10.1  
Hi 3D Slicer experts and all  
I have RT Plan which contains the MLC for radiation field. Are the edges of radiation field defined by MLC? in the other words , does MLC supported in 3D Slicer or similar to block is not supported?  
Thanks a lot

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [July 11, 2019, 3:39pm UTC](https://discourse.slicer.org/t/loading-the-mlc-with-rt-plan/7522/2 "2019-07-11T15:39:54Z")

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We do not have MLC support currently. It used to work in a rudimentary way, but the person developing it left the project, and nobody was able to take it on. It would not be a huge work to add it in a good way, but not a small one either. Please let us know if you are able to contribute, or if you have any suggestions or further questions!