Thanks a lot!

Just want to make sure that the “RAS”(FS cords?) and “MNI Talairach” is the 
MNI305 coords.



 

发件人: freesurfer-boun...@nmr.mgh.harvard.edu 
[mailto:freesurfer-boun...@nmr.mgh.harvard.edu] 代表 Douglas Greve
发送时间: 2016年8月30日 21:21
收件人: freesurfer@nmr.mgh.harvard.edu
主题: Re: [Freesurfer] Questions about surface coordanates

 

tksurfer always uses the ?h.orig coordinates. Also keep in mind that the vertex 
index is 0-based whereas matlab is 1-based. When you click on a point, you 
should see something like the following print out

selected vertex 123491 out of 163842
current  -39.11  15.65  11.26
orig     -55.67 -10.37  19.95
pial       0.00   0.00   0.00
white    -55.76 -10.29  19.93




On 8/30/16 5:12 AM, Dongnandi wrote:

Dear Experts,

I tried to extract vertex coordinates information from ‘fsaverage/surf/lh.pial’ 
file using matlab function ‘read_surf’, but I found that the coordinates 
returned by the function are different from what I saw in tksurfer, here are 
the screenshots:



The vertex index starts from 0 in tksurfer, so I select the second elements in 
matlab. Why is the result different from what has been shown in tksurfer(also 
different in freeview)? Which one should I report?

Is there any way to transform the surface coordinates to the MNI152 space?

 

Thank you very much!

Dong

 






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