# Masking in General Registration

**URL:** <https://discourse.slicer.org/t/masking-in-general-registration/488>\
**Category:** Support\
**Tags:** registration, threshold\
**Created:** [June 13, 2017, 2:35am UTC](https://discourse.slicer.org/t/masking-in-general-registration/488 "2017-06-13T02:35:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ivan\_Hidrovo](https://avatars.discourse-cdn.com/v4/letter/i/d78d45/32.png) [@Ivan\_Hidrovo](https://discourse.slicer.org/u/Ivan_Hidrovo)\
**Post date:** [June 13, 2017, 2:35am UTC](https://discourse.slicer.org/t/masking-in-general-registration/488/1 "2017-06-13T02:35:50Z")

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Hello community,

Does anybody know how to input my own created 0-1 bit mask for general registration (BRAINS) in 3D slicer?

Thank you,  
Ivan

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<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [June 13, 2017, 11:45am UTC](https://discourse.slicer.org/t/masking-in-general-registration/488/2 "2017-06-13T11:45:52Z")

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In the `Add data` dialog click `Show options` checkbox, in the `Options` column that appears on the right, click `LabelMap`. This will make the volume loaded as labelmap, which can be selected as mask in General Registration.