Re: [Freesurfer] RAS coordinates for inflated surface

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 plot the coordinates using plotPialSurf (iElVis), these locations are completely off (i.e., far outside from the insula).

I don't understand what is going wrong.

Any possible explanation?

Thanks in advance!

Giulia

-- Giulia Liberati, PhD

Institute of Neuroscience (IoNS)  Université catholique de Louvain  Avenue Mounier 53 bte B1.53.02 à 1200 Woluwe-Saint-Lambert Claude Bernard; Etage 02; Local 0826; Site Bruxelles Woluwe Brussels, Belgium