[MINC-users] temporal filtering

[David Seminowicz]

Hi Pierre and Michael, this is perfect - thanks!  dave

 

 

 

---------- Forwarded message ----------
From: Pierre Bellec <pierre.bellec at gmail.com>
Date: 2010/3/16
Subject: Re: [MINC-users] temporal filtering
To: MINC users mailing list <minc-users at bic.mni.mcgill.ca>


Dear David,

It seems that the response to your post I sent to the minc-users list a
couple of days ago got lost once again. Anyway, Michael kindly pointed at
the NIAK package which works in Matlab or Octave :
http://wiki.bic.mni.mcgill.ca/index.php/NeuroImagingAnalysisKit

To give a bit more details, it implements linear fitting of discrete cosine
(DC) basis. This approach is particularly well adapted to short signals with
poor sampling, e.g. fMRI time series, because it doesn't have marked edges
effect. Matlab also comes with a tool to design various types of filters
(see the signal processing toolbox), but methods such as Butterworth have to
be very carefully designed depending on the type of signals you are trying
to process. 


Back to the NIAK thing, you can directly filter signals in Matlab/Octave
using NIAK_FILTER_TSERIES or apply the filter on MINC or NIFTI 4D volumes
using NIAK_BRICK_TIME_FILTER. Type "help niak_brick_time_filter" on the
matlab/octave command line for more infos.

Hope this helps,

Pierre Bellec
Post-doctoral fellow
McConnel Brain Imaging Center, Webster 2B
Montreal Neurological Institute
3801 University Street         
Montreal, Quebec, Canada H3A 2B4
http://wiki.bic.mni.mcgill.ca/index.php/PierreBellec
tel:       (001)(514) 398 5220
fax:      (001)(514) 398 8948



2010/3/12 David Seminowicz <davids at bic.mni.mcgill.ca>

Does anyone have a (Matlab) script or know of good software for applying a


temporal filter (e.g. bandpass) to timecourse datasets?  Thanks, Dave



______________________
David A. Seminowicz, Ph.D.
Postdoctoral Fellow
Alan Edwards Centre for Research on Pain
McGill University
Rm M/19 Strathcona Anatomy & Dentistry
3640 University St.
Montreal, Quebec H3A 2B2



Ph: 514.398.1271
Fax: 514.398.7464



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