# might be typo in MNE coordinates system doc

**URL:** <https://mne.discourse.group/t/might-be-typo-in-mne-coordinates-system-doc/4284>\
**Category:** Support & Discussions\
**Created:** [January 17, 2022, 7:03pm UTC](https://mne.discourse.group/t/might-be-typo-in-mne-coordinates-system-doc/4284 "2022-01-17T19:03:17Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![BarryLiu97](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/barryliu97/32/33_2.png) [@BarryLiu97](https://mne.discourse.group/u/BarryLiu97)\
**Post date:** [January 17, 2022, 7:03pm UTC](https://mne.discourse.group/t/might-be-typo-in-mne-coordinates-system-doc/4284/1 "2022-01-17T19:03:17Z")

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Hi, I was reading the doc [Algorithms and other implementation details — MNE 0.24.1 documentation](https://mne.tools/stable/overview/implementation.html?highlight=coordinates#coordinate-system-figure)

 ![image](https://global.discourse-cdn.com/free1/uploads/mne/original/2X/3/34d0e1b88eee10fb7f23ab9c917dc234d6f21043.png)  
From the context below, I suppose that the **MRI Talairach coordinates** should be **MNI Talairach coordinates**?

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**Author:** ![sappelhoff](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/sappelhoff/32/3276_2.png) [@sappelhoff](https://mne.discourse.group/u/sappelhoff)\
**Post date:** [May 21, 2022, 8:16am UTC](https://mne.discourse.group/t/might-be-typo-in-mne-coordinates-system-doc/4284/2 "2022-05-21T08:16:02Z")

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I think @alexrockhill would know whether this is a typo or not.

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**Author:** ![alexrockhill](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/alexrockhill/32/31_2.png) [@alexrockhill](https://mne.discourse.group/u/alexrockhill)\
**Post date:** [May 21, 2022, 10:09pm UTC](https://mne.discourse.group/t/might-be-typo-in-mne-coordinates-system-doc/4284/3 "2022-05-21T22:09:25Z")

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To my knowledge, that’s just copied from Freesurfer and maybe also the Talairach coordinate system webpage. Saying MNI is nice because it makes that equivalence specific but it’s not wrong to say MRI either.

EDIT: Here are those references; [https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems?action=AttachFile&do=get&target=fscoordinates.pdf](https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems?action=AttachFile&do=get&target=fscoordinates.pdf) [talairach.org | About](http://www.talairach.org/about.html)