# LungCTAnalyzer error: Input lung CT is invalid

**URL:** <https://discourse.slicer.org/t/lungctanalyzer-error-input-lung-ct-is-invalid/23935>\
**Category:** Support\
**Tags:** lungctanalyzer\
**Created:** [June 19, 2022, 4:11am UTC](https://discourse.slicer.org/t/lungctanalyzer-error-input-lung-ct-is-invalid/23935 "2022-06-19T04:11:44Z")\
**Posts on this page:** 1\
**Showing post:** 5

<div class="post-metadata">

**Author:** ![rbumm](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/rbumm/32/9404_2.png) [@rbumm](https://discourse.slicer.org/u/rbumm)\
**Post date:** [June 19, 2022, 7:36am UTC](https://discourse.slicer.org/t/lungctanalyzer-error-input-lung-ct-is-invalid/23935/5 "2022-06-19T07:36:07Z")

</div>

Maybe something has gone wrong with that install on the mac.  
You could remove the Lung CT Analyzer extension and restart Slicer. Check that it is gone.

Then, clone the Lung CT Analyzer Github version by

```auto
git clone https://github.com/rbumm/SlicerLungCTAnalyzer.git

```

into a directory of your choice.

Then go to Slicers “Application settings”

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/6/e6da8f156afc8cbb9329e874b5979d8e3043e8b8.png)

and manually add two folders here:

LungCTSegmenter  
LungCTAnalyzer

Restart Slicer. This should give you the most recent version of the extension.

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_[View the full topic](https://discourse.slicer.org/t/lungctanalyzer-error-input-lung-ct-is-invalid/23935)._