Hi - you could adjust them by saving the FLIRT transforms and using
vecreg to apply the full Danny-fix, but it's probably not worth the
extra hassle given the tiny rotations involved.
Cheers, Steve.
On 22 Apr 2008, at 09:47, Alina Jurcoane wrote:
> Hi,
>
> I have a question referring to the Eddy Current Correction procedure
> in the
> FDT module:
>
> Since the procedure corrects for simple head motion, using affine
> registration to a reference volume, shouldn't the diffusion
> gradients also
> be rotated together with the respective slices? (as suggested by
> Landman,
> Farrell, Patel, Mori & Prince in DTI Fiber Tracking: The Importance of
> Adjusting DTI Gradient Tables for Motion Correction (HBM2007)
> http://www.iacl.ece.jhu.edu/~bennett/pubs/Landman-07-HBM-CATNAP.pdf)
>
> If the gradients should be rotated, then what is the procedure?
>
> Thanks,
>
> Alina
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
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