Hi,
This is effectively the same thing, because the % signal and noise
changes are so small compared with the baseline. You could generate a
"min" image over time if you wanted, using
avwmaths filtered_func_data -Tmin min_image
Cheers, Steve.
On 10 Oct 2006, at 04:29, Soohyun Cho wrote:
> Hi,
>
> The 'baseline' used in Featquery seems to be the mean signal
> intensity of the entire time series, which is not the same as the
> 'resting baseline'.
> How can we get % signal change from the 'resting baseline', which
> is, in my case, the intertrial intervals?
> (I have an event-related design with jittered inter-trial intervals.)
>
> Thank you for all your help,
>
> -S
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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)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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