External Email - Use Caution
Hi Freesurfer Experts,
About 2 weeks ago, I sent a question about the midline correction but have not
yet received a feedback. I am wondering if someone had time to check my data or
has an idea on how to correct the bad midline.
I tried to correct the aseg.presurf.mgz (Freesurfer v.6.0.0) many times with
different autorecon (wm, cp, noaseg); still, although the segmentation changes,
the midline doesn’t follow the new segmentation.
Since 10 of my subjects show this error, a solution is much needed.
Many thanks for your help!
Best,
Maxime
________________________________________
De : freesurfer-boun...@nmr.mgh.harvard.edu
<freesurfer-boun...@nmr.mgh.harvard.edu> de la part de Maxime Perron
<maxime.perro...@ulaval.ca>
Envoyé : 17 septembre 2018 10:00
À : Freesurfer support list
Objet : Re: [Freesurfer] Midline errors
External Email - Use Caution
Hi Freesurfer Experts,
I was wondering if you have had time to look at my data to correct my midline
problems? Many of my subjects have this problem.
Best regards,
Maxime
________________________________________
De : Maxime Perron
Envoyé : 13 septembre 2018 22:29
À : Freesurfer support list
Objet : Re: [Freesurfer] Midline errors
Hi Bruce,
I upload my subject to the ftp site as you requested. In the file midline_MP,
you will find a file named Freesurfer_S043_test in which I made modifications
on the aseg.presurf. The other file is the participant without modification.
The problem of the midline is from the coronal slice 137 to 157. For example,
Talairach: 1.9 4.6 14.3.
Thank you for all your help,
Maxime
> On Sep 13, 2018, at 10:08 AM, Bruce Fischl <fis...@nmr.mgh.harvard.edu> wrote:
>
> Hi Maxime
>
> if you upload a gzipped tar file of the entire subject dir to our ftp site we
> will take a look. Please include voxel coordinates of the spots you think are
> inaccurate.
>
> cheers
> Bruce
> On Thu, 13 Sep 2018, Maxime Perron wrote:
>
>> External Email - Use Caution
>>
>> Hi Freesurfer Experts,
>>
>> I tried to correct the midline with the information you provided me. Indeed,
>> I tried to correct the aseg.presurf (Freesurfer v.6) using Freeview.
>> Although parcelisation has changed, the midline has not changed. I launched
>> several types of autorecon (-noaseg, -cp, -wm), but it didn't work. Do you
>> have an idea?
>>
>> Best,
>> Maxime
>>
>>> On Aug 10, 2018, at 5:09 PM, Bruce Fischl <fis...@nmr.mgh.harvard.edu>
>>> wrote:
>>>
>>> HI Maxime
>>>
>>> check the aseg labels and make sure they are correct (and fix them if not).
>>> Probably a couple of left/right ventricle voxels are mislabeled
>>> Bruce
>>> On Fri, 10 Aug 2018, Maxime Perron wrote:
>>>
>>>> External Email - Use Caution
>>>> Hello FreeSurfer Developers,
>>>>
>>>> I use Freesurfer 6 on macOS Sierra 10.12.6. In several subjects, I found
>>>> midline cutting error, that
>>>> is the midline does not go through exactly the center of the brain in
>>>> coronal cut. For example, the
>>>> midline is a little bit fuzzy and goes through an hemisphere than the
>>>> other (see attachment). I've
>>>> searched in the mail list and I don't find the way to fix it. Does anyone
>>>> have any idea to fix it?
>>>> Thank you,
>>>> Maxime Perron
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