Hello Ryan,
Regarding your last question about software:
I haven't used it yet, but UPENN has an "ASL Data Processing Toolbox"
available at:
http://www.cfn.upenn.edu/perfusion/software.htm
cheers,
-Mike H.
> Hi ,
> I am new to FSL and functional imaging. I need to analyse pASL data
> which was acquired in a finger tapping experiment .I have tried using FSL
> FEAT to do this (Im not sure if this the best option) but I either get no
> activation areas or blobs in the wrong area.What values of spatial
> smoothing
> FWHM and z threshold should I be using. I used FEAT to analyse some BOLD
> data and it worked ok. I get blobs(in the wrong place) when using the
> simple
> perfusion subtraction option in temporal filtering option but nothing when
> using
> the full perfusion model in the 'Model setup' option. I get the following
> error in
> the log script.
>
> /usr/local/fsl/bin/fslstats thresh_zstat1 -l 0.0001 -R
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> 0.000000 0.000000
>
> /usr/local/fsl/bin/fslstats thresh_zstat2 -l 0.0001 -R
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> 0.000000 0.000000
>
> /usr/local/fsl/bin/fslstats thresh_zstat3 -l 0.0001 -R
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> 0.000000 0.000000
>
> /usr/local/fsl/bin/fslstats thresh_zstat4 -l 0.0001 -R
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> 0.000000 0.000000
>
> /usr/local/fsl/bin/fslstats thresh_zstat5 -l 0.0001 -R
> 2.300012 20.083227
>
> /usr/local/fsl/bin/fslstats thresh_zstat6 -l 0.0001 -R
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> ERROR:: Empty mask image
> 0.000000 0.000000
> Rendering using zmin=2.300012 zmax=20.083227
>
> Does anyone know why this is happening ? Also is there anything else I can
> use to analyse ASL data ? The website suggested FEAT so I started using
> it.
>
> Thanks in advance
> Ryan
>
--
Michael Harms, Ph.D.
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Conte Center for the Neuroscience of Mental Disorders
Washington University School of Medicine
Department of Psychiatry, Box 8134
Renard Hospital, Room 6615 Tel: 314-747-6173
660 South Euclid Ave. Fax: 314-747-2182
St. Louis, MO 63110 Email: [log in to unmask]
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