Hi Asaf,
>Suppose I don't want to choose or to leave out certain areas in the analysis (i.e., i want to
>perform a whole brain analysis), is there any point in using this option? >I read in the manual (section 8.8) that it speeds up the estimation process - Will it be wise
>to use my SPGR image of the whole brain, have I got anything to lose if I do this?
yes, of course, you can use your own brainmask, but note that most of the masking already happens during the normalisation, not during the estimation of your model.
Good luck,
Karsten
-- ------------------------------------------------------------- Karsten Specht, PhD Department of Biological and Medical Psychology & National Competence Centre for functional MRI University of Bergen Jonas Lies vei 91 5009 Bergen Norway Tel.: +47-555-86279 Fax: +47-555-89872 [log in to unmask] http://fmri.uib.no/ -----Ursprüngliche Nachricht----- Von: Asaf Kaftory Gesendet: 11.aug.2010 21:49:57 An: [log in to unmask] Betreff: [SPM] explicit masking in a whole-brain analysis? >Hello again dear SPM'ers, > >I have a question regarding explicit masking (under FMRI model specification): > >Suppose I don't want to choose or to leave out certain areas in the analysis (i.e., i want to perform a whole brain analysis), is there any point in using this option? >I read in the manual (section 8.8) that it speeds up the estimation process - Will it be wise to use my SPGR image of the whole brain, have I got anything to lose if I do this? > > >Thanks for your time, > >Asaf.
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