Hi Stathis,

Considering that you have calculated the tensor using dtifit output  
format, you should have a file called something like dti_tensor.nii.gz

Then you can use this file within vecreg as follows:

vecreg --tensor=dti_tensor --output=my_rotated_tensor -- 
ref=my_ref_volume --warpfield=fnirt_warpfield


On 24 Aug 2009, at 17:14, Stathis Kanterakis wrote:

> I tried using that option but I always get --tensor: Missing non- 
> optional
> argument!
> Has anyone used this option? Can you show me a sample command-line?
> Thank you for your help.
> Stathis

Saad Jbabdi
University of Oxford, FMRIB Centre

JR Hospital, Headington, OX3 9DU, UK
+44 (0) 1865 222523  (fax 717)