# Segment Editor Gaps

**URL:** <https://discourse.slicer.org/t/segment-editor-gaps/36679>\
**Category:** Support\
**Tags:** registration, segmentation, segmentations, segment-editor\
**Created:** [June 10, 2024, 11:38am UTC](https://discourse.slicer.org/t/segment-editor-gaps/36679 "2024-06-10T11:38:44Z")\
**Posts on this page:** 1\
**Showing post:** 4

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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:** [June 18, 2024, 1:42am UTC](https://discourse.slicer.org/t/segment-editor-gaps/36679/4 "2024-06-18T01:42:22Z")

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Your image looks highly anisotropic, i.e., distance between slices is huge compared to the size of pixels within a slice. Most likely you have 3 image series like this in the study, in axial, sagittal, coronal orientations.

These kind of studies are barely usable for 3D analysis, but with some effort you may still get out the information you need. You can learn more about this topic here:

> [@3D model from dicoms](https://discourse.slicer.org/t/3d-model-from-dicoms/5478/2):
>
> First of all, what would you like to segment? Simple thresholding works well in cases when structures of interest have highly distinctive intensity value on the image (bone on CT, contrasted vessels, etc.). If you want to segment bone on MRI then you need to use more sophisticated tools than thresholding. Another problem is that, quite often 3 anisotropic MRI images are acquired (high resolution along two axes, very low resolution along a third axis) to reduce time spent in the MRI scanner. How…

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_[View the full topic](https://discourse.slicer.org/t/segment-editor-gaps/36679)._