# Resolution of CT images

**URL:** <https://discourse.slicer.org/t/resolution-of-ct-images/18857>\
**Category:** Support\
**Created:** [July 21, 2021, 12:58pm UTC](https://discourse.slicer.org/t/resolution-of-ct-images/18857 "2021-07-21T12:58:31Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Mohammed110](https://avatars.discourse-cdn.com/v4/letter/m/3e96dc/32.png) [@Mohammed110](https://discourse.slicer.org/u/Mohammed110)\
**Post date:** [July 21, 2021, 12:58pm UTC](https://discourse.slicer.org/t/resolution-of-ct-images/18857/1 "2021-07-21T12:58:32Z")

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Dear all,  
I have CT images obtained online and I want to know the resolution and slice thickness, is that possible, I would appreciate any help

Thanks  
Mo

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [July 21, 2021, 1:09pm UTC](https://discourse.slicer.org/t/resolution-of-ct-images/18857/2 "2021-07-21T13:09:05Z")

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You can look in the Volume Information section of the Volumes module.

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<div class="post-metadata">

**Author:** ![Mohammed110](https://avatars.discourse-cdn.com/v4/letter/m/3e96dc/32.png) [@Mohammed110](https://discourse.slicer.org/u/Mohammed110)\
**Post date:** [July 21, 2021, 1:14pm UTC](https://discourse.slicer.org/t/resolution-of-ct-images/18857/3 "2021-07-21T13:14:24Z")

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Thanks, but is it ok to upload the nrrd instead of DICOM

Regrads,  
MO

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<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [July 21, 2021, 1:23pm UTC](https://discourse.slicer.org/t/resolution-of-ct-images/18857/4 "2021-07-21T13:23:20Z")

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If you work with nrrd the geometry is all in text at the top of the file. Most text editors can open it and you can read it. The meanings are defined [in the nrrd spec](http://teem.sourceforge.net/nrrd/descformat.html).

Or you can load in Slicer and look in the Volume Information.