Dear Alle,
Yes POSSUM does the first, i.e. you can specify motion at any time
point and each slice (actually each point in the k-space) will be
affected with the motion. So, not just a simple transformation of
volumes or slices but rather simulation of continuous motion.
Best,
Ivana
On 1 May 2009, at 12:40, Alle Meije Wink wrote:
> Dear FSL'ers
>
> I was looking at the Possum interface, to seee if it is possible to
> simulate EPI data with large, continuous subject movement.
>
> What I am trying to get is a file where the slices are sampled
> individually at the slice acquisition times. Does Possum do this?
>
> Example, for a volume of 10 slices with a TR of 2s (slices sampled
> at times 0.2s apart) and motion parameters defined at the slice
> times, would I get a data set consisting of slices that all have
> slightly different movement, or would all the slices of a volume
> (after interpolation of the motion parameters) have the same
> transformation?
>
> If it is the second, is it possible (perhaps with the use of the
> command-line tools) to get the first result?
>
> Many thanks
> Alle Meije Wink
>
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