Hi Caspar, I don't have anything that is plug-and-play for RETROICOR.
You will need a text file to use as an external regressor with one
column for each regressor and one row for each time point. You can play
with my matlab functions. First, pass the waveform (cardiac or
respiration) to peakfinder.m, then call fast_retroicor.m passing it the
peaks and returning the regressors. Then save the regressors you want in
a text file and specify them using -nuisreg option to mkanalysis-sess.
doug
> _______________________________________________
On 07/18/2012 11:28 AM, Caspar M. Schwiedrzik wrote:
> Hi!
> Has someone used retroicor (retroactive correction of physiological
> noise; Glover at al. 2000) with Freesurfer?
> I would like to create nuisance regressors for EPI data based on
> cardiac and respiratory signals.
> The AFNI version of retroicor produces slice-based regressors, and I
> am not sure how to use them in Freesurfer.
> Suggestions for alternative implementations would also be appreciated.
> Thanks!
> Caspar
>
>
>
>
> Freesurfer mailing list
> Freesurfer@nmr.mgh.harvard.edu
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
greve@nmr.mgh.harvard.edu
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