LeiNa, Chin,
> In SPM2, I have estimated a model that only consists of some
> explanatory variables (head motion, respiration, pulsation¡Ä)
> unrelated to my exp design, and got the parameters (¦Â ),
>
> Now I want to get a new time course that do not include variables
> in above model and save it as series 3D ANALYZE images (or as the
> raw fMRI data)?
The SPMd toolbox creates a 4D dataset of *standardized* residual
(i.e., it does it SPM2 style, as a sequence of 3D analyze files).
(Standardized residuals are the residual divided by their standard
deviation.)
With a trivial modification to the SPMd code you can write out
un-standardized residuals, what you seem to desire. One key
limitation, though, is that SPMd only works with single-session SPM2
analyses.
To do this, you'll need to
(a) download SPMd, http://www.sph.umich.edu/ni-stat/SPMd
(b) Edit the file spmd_MkResid.m
You'll see that at line 119 it makes the raw (unstandardized)
residuals, and then from lines 123-138 it proceeds to
standardize the residuals. Simply comment out lines 123-138
and the function will produce the residuals you want.
(c) Run spmd_MkResid. The function will ask for the SPM.mat file
and for a directory where you want to write all of the residual
images.
Hope this helps!
-Tom
-- Thomas Nichols -------------------- Department of Biostatistics
http://www.sph.umich.edu/~nichols University of Michigan
[log in to unmask] 1420 Washington Heights
-------------------------------------- Ann Arbor, MI 48109-2029
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