# Applying paint brush results in clipped labels on some CT spine volumes

**URL:** <https://discourse.slicer.org/t/applying-paint-brush-results-in-clipped-labels-on-some-ct-spine-volumes/16483>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [March 11, 2021, 10:09pm UTC](https://discourse.slicer.org/t/applying-paint-brush-results-in-clipped-labels-on-some-ct-spine-volumes/16483 "2021-03-11T22:09:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ron](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ron/32/10835_2.png) [@Ron](https://discourse.slicer.org/u/Ron)\
**Post date:** [March 11, 2021, 10:09pm UTC](https://discourse.slicer.org/t/applying-paint-brush-results-in-clipped-labels-on-some-ct-spine-volumes/16483/1 "2021-03-11T22:09:36Z")

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Operating system: Win 10  
Slicer version:4.11  
Expected behavior: Be able to mark the full vertebral anatomy  
Actual behavior: Using the paintbrush tool in the segment editor, label maps seem to be “clipped” anteriorly ( see L5-L3). The volume was cropped and the voxel set to iso ( 0.3125^2, 0.5) to (0.3125^3). Happy to load up an image, but I do not see how. This is likely a setting I am missing. Goel is to use grow from seeds. My first of many Q :). Thanks, Ron

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**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:** [March 24, 2021, 3:58pm UTC](https://discourse.slicer.org/t/applying-paint-brush-results-in-clipped-labels-on-some-ct-spine-volumes/16483/2 "2021-03-24T15:58:51Z")

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See this documentation section on [how to specify correct extents for your segmentation](https://slicer.readthedocs.io/en/latest/user_guide/modules/segmenteditor.html#cannot-paint-outside-some-boundaries).