Hi - see Christian's recent postings on this. In general we do not
recommend time series concatenation for signal processing reasons. Time
series to not match well after concatenation, you end up with different
interpolation-realted blurring in different chunks of data, etc.
Instead we recommend combining first-level analyses at higher-level.
Thanks, Steve.
On Mon, 23 Jun 2003, George Tourtellot wrote:
> Hello,
>
> I'm interested in aligning one time-series to another time-series collected in the
> same session. I've tried a couple of different things:
> 1)concatenating volumes from both time series and then running mcflirt on the result,
> 2)running mcflirt on one time-series, then using flirt to register each volume in the
> other time series to the corresponding volume in the motion-corrected one.
>
> do you have an opinion about the validity of these methods, and/or do you have
> another method that you could suggest?
>
> thanks,
> George
>
Stephen M. Smith MA DPhil CEng MIEE
Associate Director, FMRIB and Analysis Research Coordinator
Oxford University Centre for Functional MRI of the Brain
John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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