# Why is the number of voxels different from the number of matrices?

**URL:** <https://discourse.slicer.org/t/why-is-the-number-of-voxels-different-from-the-number-of-matrices/7134>\
**Category:** Support\
**Tags:** segmentation, volume\
**Created:** [June 12, 2019, 9:55am UTC](https://discourse.slicer.org/t/why-is-the-number-of-voxels-different-from-the-number-of-matrices/7134 "2019-06-12T09:55:57Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![kscript](https://avatars.discourse-cdn.com/v4/letter/k/ec9cab/32.png) [@kscript](https://discourse.slicer.org/u/kscript)\
**Post date:** [June 14, 2019, 5:32am UTC](https://discourse.slicer.org/t/why-is-the-number-of-voxels-different-from-the-number-of-matrices/7134/7 "2019-06-14T05:32:29Z")

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Umm… I don’t understand why not necessary.

I want to auto annotation software using deep learning. So i labeling in image’s some part.  
if i make a deep learning model that time input file is patient’s nrrd file. reasult is annotation on image.  
So i think to combine two files works necessary

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