no worries, I'm glad it worked out
Bruce
On Fri, 25 May 2018, Giulia Liberati
wrote:
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Hi Bruce,
You are right.
There was a silly bug in my plotting script which I managed to fix.
So now everything is at its place!
Thank you very much for your pa
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Hi Bruce,
You are right.
There was a silly bug in my plotting script which I managed to fix.
So now everything is at its place!
Thank you very much for your patience and support!
Giulia
2018-05-25 15:52 GMT+02:00 Bruce Fischl :
> Hi Giulia,
>
> n
Hi Giulia,
no, that shouldn't be the case. You don't care about the RAS coordinates
of the inflated vertex - only its index. Use the index to look up the
corresponding vertex on another surface like white, then use its RAS
coords. Should work for any spot in the brain.
cheers
Bruce
On Fri, 2
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I will try to to show you an example of the issue, so it may be clearer.
Let's say I have a contact in the left posterior insula with MNI
coordinates -33, -12, 13.
This corresponds to vertex 4983.
RAS coordinates on a pial surface: -35.1280 -10.8052
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Thank you Bruce,
Yes, this is what I did.
Because the insular contacts are not in the insula anymore after I use the
vertex to find the RAS coordinates for the inflated surface, my conclusion
is that this only works with surface electrodes, not depth
See this page to figure out how to get the scanner coords
https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems
On 05/24/2018 05:21 PM, Bruce Fischl wrote:
> Hi Giulia
>
> find the vertex index of the vertex you are interested in, then read
> the surface whose RAS coordinates you want (e
Hi Giulia
find the vertex index of the vertex you are interested in, then read the
surface whose RAS coordinates you want (e.g. the white or pial) and
lookup the RAS coords of the vertex at that index.
cheers
Bruce
On Thu, 24 May 2018,
Giulia Liberati wrote:
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Dear FreeSurfer experts,
How can you obtain RAS coordinates for an inflated surface when you have
vertex #?
I am using the function read_surf('lh.inflated') to find the coordinates of
some electrode contacts located in the left insula. However, when I
