or do
----
imgs=spm_select; %select your T1s to average here
N=size(imgs,1);
V=spm_vol(imgs);
data=spm_read_vols(V(1));
data_c=zeros(size(data));
for i=1:N,
data=spm_read_vols(V(i));
data_c = data_c + data/N;
end
V(1).fname='/home/bokyung/data/averageT1.nii' %or wherever you want your average image to go
spm_write_vol(V(1),data_c);
---
hope i didnt make any typos or mistakes....
Op 02-12-11 16:06, Jeff Browndyke schreef:
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,Thanks a lot in advance& Best Regards.
I'd like to average T1 anatomical images of all my subjects using spm8, but it's hard to find how to do this.
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...
How can I do this and make average T1 image of all subjects? A little advice would be really appreciated.
-----------------------------------------------------------------------Durham VA& Duke University Medical Centers
Jeff Browndyke, Ph.D.
Clinical& Research Neuropsychologist
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