The difference could be "normal". It depends on how much motion there was. Can you post the realignment plot and/or the art_global plot?
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From: SPM (Statistical Parametric Mapping) [[log in to unmask]] On Behalf Of Nicole Van Hoeck [[log in to unmask]]
Sent: Tuesday, December 07, 2010 11:33 AM
To: [log in to unmask]
Subject: [SPM] Use of ArtRepair-large differences
Dear SPM users,
I’m using the toolbox ArtRepair for the first time. I’m surprised how much my results change. Therefore, I start to doubt myself in correctly applying this program.
This is the procedure I followed:
1) art_slice before preprocessing (Number of slices repaired: 515 = 1.5%)
2) art_global: ‘repair’ volumes (+ use of ‘clip’)
3) 1st model with the v-files (repaired files) and motion parameters as regressors
4) art_summary to compare repaired model to non-repaired model
Attached you can find the results (repaired and not repaired) of one of my subjects for one contrast.
Is the difference in results ‘normal’?
Thank you,
Nicole
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Nicole Van Hoeck
Department of Clinical & Lifespan Psychology | Department of Experimental & Applied Psychology
Faculty of Psychology & Educational Science
Vrije Universiteit Brussel
Pleinlaan 2 | 1050 Brussels | Belgium
office: 3C235
phone: +32-(0)-2 / 629 25 26
email: [log in to unmask]<mailto:[log in to unmask]>
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