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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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