# Cannot segment the inferior part of the volume

**URL:** <https://discourse.slicer.org/t/cannot-segment-the-inferior-part-of-the-volume/10306>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [February 17, 2020, 9:01am UTC](https://discourse.slicer.org/t/cannot-segment-the-inferior-part-of-the-volume/10306 "2020-02-17T09:01:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![doc-xie](https://avatars.discourse-cdn.com/v4/letter/d/c77e96/32.png) [@doc-xie](https://discourse.slicer.org/u/doc-xie)\
**Post date:** [February 17, 2020, 9:01am UTC](https://discourse.slicer.org/t/cannot-segment-the-inferior-part-of-the-volume/10306/1 "2020-02-17T09:01:20Z")

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Hi everyone,  
In Segment Editor module, the inferior part of the volume cannot be segmented no matter in Scissors or Threshold effect (attached figure).

 ![Screen Shot 2020-02-17 at 4.49.26 PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/d/8d3043786339a43a0a37f40a98bc55e24fb6499e.jpeg) ![Screen Shot 2020-02-17 at 4.51.02 PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/c/fc9950a76a04c4a4fe344d4ef172eefe3bb08f96.jpeg)  
Version: 4.11.0  
System: Mac  
Best wishes,  
Xie

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<div class="post-metadata">

**Author:** ![doc-xie](https://avatars.discourse-cdn.com/v4/letter/d/c77e96/32.png) [@doc-xie](https://discourse.slicer.org/u/doc-xie)\
**Post date:** [February 17, 2020, 9:04am UTC](https://discourse.slicer.org/t/cannot-segment-the-inferior-part-of-the-volume/10306/2 "2020-02-17T09:04:14Z")

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Moreover, the volume can be labeled totally in Editor module.

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**Author:** ![JanWitowski](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/janwitowski/32/4512_2.png) [@JanWitowski](https://discourse.slicer.org/u/JanWitowski)\
**Post date:** [February 17, 2020, 9:21am UTC](https://discourse.slicer.org/t/cannot-segment-the-inferior-part-of-the-volume/10306/3 "2020-02-17T09:21:08Z")

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Can you check that you have correctly set your master volume? If yes, try changing the source segmentation geometry to your input volume:

![](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/b/3bf540d03f2886ffa3322ec1e431dafbf72e2551.png)

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<div class="post-metadata">

**Author:** ![doc-xie](https://avatars.discourse-cdn.com/v4/letter/d/c77e96/32.png) [@doc-xie](https://discourse.slicer.org/u/doc-xie)\
**Post date:** [February 17, 2020, 1:35pm UTC](https://discourse.slicer.org/t/cannot-segment-the-inferior-part-of-the-volume/10306/4 "2020-02-17T13:35:55Z")

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Thank you very much!  
It works well for me now.  
Best wishes,  
Xie