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Or in imcalc (again), but without i1+i2+i3+i......ad infinitum: - Set "read to data matrix" - Select all your images - Expression = sum(X)./n ...where n=number of images - Chris On Fri, Dec 2, 2011 at 3:16 PM, S.F.W. Neggers <[log in to unmask]>wrote: > 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, >>> >>> >>> 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. >>> >>> >>> >>> Thanks a lot in advance& Best Regards. >>> >>> >> ------------------------------**------------------------------** >> ----------- >> Jeff Browndyke, Ph.D. >> Clinical& Research Neuropsychologist >> Durham VA& Duke University Medical Centers >> >> >> [log in to unmask] / [log in to unmask] >> office: (919) 286-0411 ext. 4656 >> cell: (336) 264-4222 >> >> > > > -- > ------------------------------**-------------------- > Dr. S.F.W. Neggers > Division of Brain Research > Rudolf Magnus Institute for Neuroscience > Utrecht University Medical Center > > Visiting : Heidelberglaan 100, 3584 CX Utrecht > Room B.01.1.03 > Mail : Huispost B01.206, P.O. Box 85500 > 3508 GA Utrecht, the Netherlands > Tel : +31 (0)88 7559609 > Fax : +31 (0)88 7555443 > E-mail : [log in to unmask] > Web : http://www.neuromri.nl/people/**bas-neggers<http://www.neuromri.nl/people/bas-neggers> > : http://www.neuralnavigator.com (CEO) > ------------------------------**-------------------- > > > ------------------------------**------------------------------** > ------------------ > > De informatie opgenomen in dit bericht kan vertrouwelijk zijn en is > uitsluitend bestemd voor de geadresseerde. Indien u dit bericht onterecht > ontvangt, wordt u verzocht de inhoud niet te gebruiken en de afzender > direct > te informeren door het bericht te retourneren. Het Universitair Medisch > Centrum Utrecht is een publiekrechtelijke rechtspersoon in de zin van de > W.H.W. > (Wet Hoger Onderwijs en Wetenschappelijk Onderzoek) en staat geregistreerd > bij > de Kamer van Koophandel voor Midden-Nederland onder nr. 30244197. > > Denk s.v.p aan het milieu voor u deze e-mail afdrukt. > > ------------------------------**------------------------------** > ------------------ > > This message may contain confidential information and is intended > exclusively > for the addressee. If you receive this message unintentionally, please do > not > use the contents but notify the sender immediately by return e-mail. > University > Medical Center Utrecht is a legal person by public law and is registered at > the Chamber of Commerce for Midden-Nederland under no. 30244197. > > Please consider the environment before printing this e-mail. >