External Email - Use Caution
The current versions of FS require an intensity normalization step be
run on 7T data prior to running it through FS. I have used SPM VBM for
this, but I think samseg should work too, eg,
samseg --i t1.mgz --o samseg
Then use samseg/mode01_bias_corrected.mgz as input to FS.
On 5/2/2023 10:28 AM, Jastrzebowska, Maya Anna wrote:
>
> External Email - Use Caution
>
> Dear Doug,
>
> I'm having the same issue as numerous others have described: a failure
> to run the Intensity Normalization step of recon-all on a single
> subject's skull-stripped T1-MP2RAGE 7T data, with the following error
> displayed in the log file:
>
> mri_normalize -g 1 -seed 1234 -mprage -noconform nu.mgz T1.mgz
>
> [...]
>
> 3d normalization pass 1 of 2
>
> error: MRInormFindControlPoints: could not find enough control points
>
> error: MRInormFindControlPoints failed
>
> I am attaching the log file here.
>
> I am able to run recon-all without errors for other subjects with the
> same sequence and preprocessing steps (removing MP2RAGE background
> noise as suggested by Marques et al., bias correction and
> skull-stripping).
>
> Please let me know if a solution has been found for this issue. Thank
> you in advance for your help!
>
> Best,
>
> Maya Jastrzebowska
>
>
>