of course easier said than done with 500 subjects, if you had 500 subjects which would you then do
greg
On 09/01/11, Saad Jbabdi wrote:
> 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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