Re: [Freesurfer] Problem with cortical parcellation of rh but not lh

Hi,

Yes I've seen it for multiple subjects.

I'm using version 6.

Here are the results for one participants, let me know if you need any other file.

Thanks

Amal

________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Bruce Fischl fischl@nmr.mgh.harvard.edu Sent: Thursday, February 15, 2018 8:37 PM To: Freesurfer support list Subject: Re: [Freesurfer] Problem with cortical parcellation of rh but not lh

Hi Amal

this happens for multiple subjects? What version are you using? I have only ever seen this very rarely and usually for an atypical (e.g. multiple central sulci) folding pattern. Can you upload a subject so I can take a look?

cheers Bruce On Tue, 13 Feb 2018, Amal Achaibou wrote:

Hello,

I'm new to freesurfer and have been trying to use it for cortical parcellation of individual T1s running recon-all -s subID -i sunT1 -all command. I'm specifically interested in getting parahippocampal and perirhinal ROIs for each individual. It appears that the parcellation is correct for the left hemisphere but not for the right hemisphere... I found that there were also mislabeling for precentral and postcentral gyrus (as easy gyri to identify), and that regardless of if I looked at the aparc.annot or the aparc.DKTatlas.annot parcellation scheme.

Is there any reason why I have this systematic mistake? Attached is the example for one subject (others looked very similar).

Thanks

Amal

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