Hi Tim,

Case #8 is transforming between MNI152 and MNI305 spaces. MNI305 is different from fsaverage: one is a volumetric space and one is a surface space.

If you are indeed looking for a transformation between MNI152 volumetric space and fsaverage surface space, you can consider the following: https://github.com/ThomasYeoLab/CBIG/tree/master/stable_projects/registration/Wu2017_RegistrationFusion

Regards,
Thomas

On Sat, Feb 9, 2019 at 11:11 PM Tim Schäfer <ts+ml@rcmd.org> wrote:

External Email - Use Caution

> Dear list,
>
> I have some points of interest (volume coordinates, e.g. '5.9, -27.7, 49.7') in MNI152 space. I would like to transform them to fsaverage space.
>
> How should I do that?
>

To answer my own question, this seems to be explained as use case #8 on the following website (at the bottom):

https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems

To be precise, the website explains the transformation in the opposite direction, so one should use the inverse of the matrix given on the website.

--
Tim

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