Hi,
On 25 Apr 2006, at 12:59, Jay Ives wrote:
> I wonder if someone can clarify a point.
>
> I have a dataset of 60 TR=3sec volumes of a block design experiment,
> 10 off
> 10 on
> 10 off
> 10 on
> 10 off
> 10 on
> and then perhaps I choose to delete 2 volumes.
>
> Does this shift the timing to
> 8 off
> 10 on
> 10 off
> 10 on
> 10 off
> 10 on
> i.e. changes the paradigm to be fitted,
Yes, that's right - it's all in the "delete volumes" bubble-popup
help and in the manual :)
>
> Does FEAT just ignore the data from the first 2 volumes and the
> timing is
> correct, or recognise that the first "off" set is only 8 volumes long?
>
> Rather, should I be doing extra dummy scans i.e.
> 12 off
> 10 on
> 10 off
> 10 on
> 10 off
> 10 on
> so FEAT gets the correct number of useful volumes?
>
> Thanks................J
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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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