Once the file is in 3-column format:
cat yourfilename | awk '{print $1 -$2 $3}'
On Thu, 31 Oct 2013, Salil Soman wrote:
Hi Anastasia,
Thank you for this code piece. Is there a way to modify it so that set y's
sign gets flipped? (I have a dataset where its is acquired on GE (so the Y
row
Hi,
I have dicoms that I turn to nifti using dcm2nii (with the default settings
plus anonymization option turned on [-a y]). The bvec files it generates by
default are 3 rows by n columns (where n is b0 number + directions). I am
under the impression tracula requires this to be converted to a n
set x = `cat bvecs | awk '{if (NR==1) print}'`
set y = `cat bvecs | awk '{if (NR==2) print}'`
set z = `cat bvecs | awk '{if (NR==3) print}'`
@ k = 1
while ( $k = `head -1 bvecs|wc -w` )
echo $x[$k] $y[$k] $z[$k]
@ k = $k + 1
end
I'd make sure though dcm2nii doesn't L-R flip the gradient
Thank you for the email.
I saw a warning to check for flipping L-R from the dcm2nii site:
http://www.mccauslandcenter.sc.edu/mricro/mricron/dcm2nii.html
Is the problem you mentioned vendor specific (I have all GE data). Is there
a different tool you would recommend for generating the bvec files?
Hi Sal - Right now you'd just have to try it on one data set and look at
the eigenvectors of the tensor (display dmri/dtifit_V1.nii.gz as lines) to
make sure they're pointing in the right way.
I'm hoping for the next freesurfer release to finally get mri_convert to
read gradient vectors off
Thank you for your response. Is there a best way to review the eigenvectors
(tkmedit, freeview, other program?).
Thank you.
-S
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Freeview can do this in principle, but the current version of freeview has
a known bug with displaying eigenvectors as lines (see known issues in
http://surfer.nmr.mgh.harvard.edu/fswiki/ReleaseNotes), so for now you can
use fslview.
On Wed, 7 Aug 2013, Salil Soman wrote:
Thank you for
