I would go with option 2 and visually check that the registration has worked and didn't make things worse
Saad.
On 31 Aug 2011, at 22:19, Gregory Kirk wrote:
> hi folks, maybe a common Q. but could not find an answer in the archive
>
> data sets i want to bedpost, i have 2 diffusion acquisitions for each subject, same day
> same acquisition parameters, directions etc.
>
> 1. suggested by someone i should concatenate the 2
>
> i.e. put at the b=0 at the beginning, then conncatenate all the diffusion weighted
> volumes and also the bvec files, and then feed this into the stream,eddy cor. rot bvec
> bedpost.
>
> 2. actually averaging seems small errors from registration would nagate any increase in snr
>
>
> 3. only use 1 acquisition from each subject
>
> whats your advice ?
>
> thank you
>
> greg
>
--
Saad Jbabdi
University of Oxford, FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
(+44)1865-222466 (fax 717)
www.fmrib.ox.ac.uk/~saad
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