Hi
> Hello,
>
> I have applied FSL DTIFIT on my data.
> Among the output files I have got a file named "dti_V1_b.nii" which represents the eigenvector corresponding to the 1st eigenvalue L1.
I am surprised by the "_b" . DTIFIT should only give "_V1". Did you rename it or something?
>
> I have then converted my "dti_V1_b.nii" to .hdr and .img format using MRIcron and I have finally obtained 3 separate files:
>
> dti_V1_b_1(.hdr and .img format)
> dti_V1_b_2(.hdr and .img format)
> dti_V1_b_3(.hdr and .img format)
>
> I think that each file corresponds to the component of the first eigenvector V1 along the x,y or z axis.
yes, unless mricron is playing a trick on you.
>
> My questions are:
> - How can I know which file represents the component of V1 along the x axis (and along the y and z axis as well)?
1=x, 2=y, 3=z
> - Do you know the orientation of the x,y and z axis?
they are the same as the voxel grid. you can see that if you open the V1 file in fslview.
Saad
>
> Thank you for your help
>
> Best regards
>
> L. Vanquin
>
--
Saad Jbabdi
University of Oxford, FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
(+44)1865-222466 (fax 717)
www.fmrib.ox.ac.uk/~saad
|