# DTIPrep installation

**URL:** <https://discourse.slicer.org/t/dtiprep-installation/1885>\
**Category:** SlicerDMRI\
**Created:** [January 21, 2018, 3:23pm UTC](https://discourse.slicer.org/t/dtiprep-installation/1885 "2018-01-21T15:23:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nahid](https://avatars.discourse-cdn.com/v4/letter/n/fbc32d/32.png) [@nahid](https://discourse.slicer.org/u/nahid)\
**Post date:** [January 21, 2018, 3:23pm UTC](https://discourse.slicer.org/t/dtiprep-installation/1885/1 "2018-01-21T15:23:01Z")

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Dear 3D Slicer experts  
I am pretty new in 3d Slicer. I want to use DTIPrep but it is not in the list of extensions to be installed. I have downloaded it separately but I don’t know how to install it.  
Any help appreciated.

Nahid

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**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [January 22, 2018, 3:36pm UTC](https://discourse.slicer.org/t/dtiprep-installation/1885/2 "2018-01-22T15:36:48Z")

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Here is a link to Slicer packages from 2018-01-10 which should have the extension available:

macOS: [http://slicer.cdash.org/viewFiles.php?buildid=1173431](http://slicer.cdash.org/viewFiles.php?buildid=1173431)  
linux: [http://slicer.cdash.org/viewFiles.php?buildid=1173432](http://slicer.cdash.org/viewFiles.php?buildid=1173432)  
(windows does not seem to be building recently)

cc @juanprietob, if you have a chance to take a look, I think [this commit](https://github.com/NIRALUser/DTIPrep/commit/e2990a026f1a383eca46bece0816aeecb8d1e15e), possibly combined with Slicer core changes, broke the extension build starting from 01-11 (here’s the CDash: [http://slicer.cdash.org/index.php?project=Slicer4&date=2018-01-11&filtercount=1&showfilters=1&field1=label&compare1=63&value1=DTIPrep](http://slicer.cdash.org/index.php?project=Slicer4&date=2018-01-11&filtercount=1&showfilters=1&field1=label&compare1=63&value1=DTIPrep)).

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**Author:** ![mppesce22](https://avatars.discourse-cdn.com/v4/letter/m/f4b2a3/32.png) [@mppesce22](https://discourse.slicer.org/u/mppesce22)\
**Post date:** [March 16, 2021, 5:24pm UTC](https://discourse.slicer.org/t/dtiprep-installation/1885/3 "2021-03-16T17:24:08Z")

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I am running Slicer 4.11.0-2019-5-01 and am unable to see DTIPrep as an extension to add to the program. What is the best way to add the extension?