2012/7/18 Douglas N Greve <greve@nmr.mgh.harvard.edu>

M is the number of regressor pairs. Leave out the others and it will
figure them out.

On 07/18/2012 01:43 PM, Caspar M. Schwiedrzik wrote:
> and some more questions: in fast_retroicor(t,indpeak,M,peakamp,troughamp)
> what is t / M?
> how do I get peakamp and throughamp?
> thanks again, caspar
>
> 2012/7/18 Caspar M. Schwiedrzik <cschwiedrz@rockefeller.edu

> <mailto:cschwiedrz@rockefeller.edu>>

>
> great!
> one more question: how do I choose fmin and fmax?
> thanks, caspar
>
> 2012/7/18 Douglas N Greve <greve@nmr.mgh.harvard.edu

> <mailto:greve@nmr.mgh.harvard.edu>>

>
> Try this
> ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/fast_retroicor.m
>
>
>
> On 07/18/2012 01:25 PM, Caspar M. Schwiedrzik wrote:
>
> Hi Doug,
> thanks for your advice. I am using
> freesurfer-Linux-centos4_x86_64-stable-pub-v5.1.0-full,
> while I have a copy of peakfinder.m, fast_retroicor.m does
> not seem to be part of the package.
> Could you let me know where to download it?
> Thanks, Caspar
>
>
> 2012/7/18 Douglas N Greve <greve@nmr.mgh.harvard.edu
> <mailto:greve@nmr.mgh.harvard.edu>

> <mailto:greve@nmr.mgh.harvard.edu

> <mailto:greve@nmr.mgh.harvard.edu>>>
>
>
> 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
> >
> >
> >
> >
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> --
> Douglas N. Greve, Ph.D.
> MGH-NMR Center
> greve@nmr.mgh.harvard.edu
> <mailto:greve@nmr.mgh.harvard.edu>

> <mailto:greve@nmr.mgh.harvard.edu

> <mailto:greve@nmr.mgh.harvard.edu>>
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> --
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> MGH-NMR Center
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MGH-NMR Center
greve@nmr.mgh.harvard.edu

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