The SPM imCalc function is quite useful for this purpose.
If you already have normalized T1 images, then you would simply specify (i1+i2+i3+i4...ix)/x, where x is the total number of images.
Jeff
On Dec 2, 2011, at 9:58 AM, BoKyung Park wrote:
> Dear All,
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> I'd like to average T1 anatomical images of all my subjects using spm8, but it's hard to find how to do this.
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> As some previous works indicated, I coregistered T1 anatomy images to individual subjects' mean EPI then normalised the T1 images but I couldn't understand how I could average these normalised anatomical images...
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> How can I do this and make average T1 image of all subjects? A little advice would be really appreciated.
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>
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> Thanks a lot in advance & Best Regards.
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Jeff Browndyke, Ph.D.
Clinical & Research Neuropsychologist
Durham VA & Duke University Medical Centers
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