that seems ok, as I think the default is nearest neighbor. Can you 
visualize the volume you created and see if the incorrect labels are in 
it?

On Wed, 12 Oct 2016, Crawford, Anna wrote:

> I used:
>
> --src 
> /mnt/netScratch/crawforda/BrainStem/study11074/S2sdt/segfs/mri/aparc+asegRMpostcent2.mgz
>  --out 
> /mnt/netScratch/crawforda/BrainStem/study11074/S2sdt/segfs/surf/lh.aparc+asegRMpostcent2S.mgh
>  --regheader segfs --hemi lh --surf white --out_type mgh
>
>> From the help file online, it looks like --fixtkreg would be used for the 
>> nearest neighbor. What is the proper flag to set it to use nearest neighbor 
>> interpolation?
>
> Thanks,
> Anna
> ________________________________________
> From: freesurfer-boun...@nmr.mgh.harvard.edu 
> [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Bruce Fischl 
> [fis...@nmr.mgh.harvard.edu]
> Sent: Tuesday, October 11, 2016 10:29 PM
> To: Freesurfer support list
> Subject: Re: [Freesurfer] Remapping Volume
>
> what was your vol2surf command line? Make sure that it is using nearest
> neighbor interpolation
> On Tue, 11 Oct 2016, Crawford, Anna wrote:
>
>> Hi,
>>
>> I am trying to remap a volume. I am using aparc+aseg.mgz volume. I loaded it
>> into Matlab using load_mgh. In Matlab I remap the volume to different
>> values. For example, all original values of 1022 will become 200 and all
>> 1030 values will become 150. (This is just an example, not necessarily these
>> numbers.) I save a new aparc+asegNew.mgz file using save_mgh. I use the same
>> M and mr_parms that I got when I loaded in the original file. I'm not sure
>> what these mean or if I need to change them. Then I use mri_vol2surf to
>> create a new surface overlay onto the inflated hemisphere. When I do this,
>> each region such as post central gyrus is 2 colors spotted together instead
>> of a solid color like in the original. I have attached pictures as an
>> example of what the original and remapped looked like. I didn't change the
>> location of values, just simple gave each value a new one. Why is the one
>> value speckled throughout?
>>
>> Thank you,
>> Anna
>>
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