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Bedda, The volume of each cluster is simply the number of voxels*voxelsize, where voxel size is xdim*ydim*zdim. This is easiest enough to do post-hoc on your own. The reason this isn't implemented automatically is that cluster extent is defined using number of contiguous voxels. The output image will be a map of T-statistics in all clusters. If you want to extract those values, I'd recommend AFNI. Specifically, they have a tool called 3dmaskdump that could dump the T-statistics from all voxels using a mask image. Something like: 3dmaskdump -mask *clusters.nii -mrange a b spmT_*.nii/.img where a and b are the numbers above and below the actual cluster number. AFNI is free and easily runs on Mac and Linux boxes. Hope this helps. Best Regards, Donald McLaren ================= D.G. McLaren, Ph.D. Postdoctoral Research Fellow, GRECC, Bedford VA Research Fellow, Department of Neurology, Massachusetts General Hospital and Harvard Medical School Office: (773) 406-2464 ===================== This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is intended only for the use of the individual or entity named above. If the reader of the e-mail is not the intended recipient or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that you are in possession of confidential and privileged information. Any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited and may be unlawful. If you have received this e-mail unintentionally, please immediately notify the sender via telephone at (773) 406-2464 or email. On Thu, May 12, 2011 at 3:15 PM, Bedda Rosario <[log in to unmask]> wrote: > Hello Donald, > > Thank you for your response and the information. It is very useful, > peak.nii and cluster.nii provides information about cluster size, peak > statistic, coordinates, cluster number and region name. Do you know if it > is possible to also get the volume for each cluster (or the value (e.g. > t-value) from each voxel for a specific cluster)? > > Thanks for the help, > Bedda > > On Tue, May 10, 2011 at 5:21 PM, MCLAREN, Donald <[log in to unmask] > > wrote: > >> See the following posts: >> >> http://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=ind1103&L=SPM&P=R25661&I=-3&d=No+Match%3BMatch%3BMatches&m=41734 >> >> >> http://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=ind1103&L=SPM&P=R16468&I=-3&d=No+Match%3BMatch%3BMatches&m=41734 >> >> Best Regards, Donald McLaren >> ================= >> D.G. McLaren, Ph.D. >> Postdoctoral Research Fellow, GRECC, Bedford VA >> Research Fellow, Department of Neurology, Massachusetts General Hospital >> and Harvard Medical School >> Office: (773) 406-2464 >> ===================== >> This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED >> HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is >> intended only for the use of the individual or entity named above. If the >> reader of the e-mail is not the intended recipient or the employee or agent >> responsible for delivering it to the intended recipient, you are hereby >> notified that you are in possession of confidential and privileged >> information. Any unauthorized use, disclosure, copying or the taking of any >> action in reliance on the contents of this information is strictly >> prohibited and may be unlawful. If you have received this e-mail >> unintentionally, please immediately notify the sender via telephone at (773) >> 406-2464 or email. >> >> >> >> On Tue, May 10, 2011 at 3:09 PM, Bedda Rosario <[log in to unmask]>wrote: >> >>> Dear SPM users, >>> >>> I have created an image (and hdr file) using the results of a t test >>> analysis in SPM8 (that is, using spmT_0001.img). I would like to know if it >>> possible to get a cluster report from the image without a corresponding >>> SPM.mat file. >>> >>> Thanks for the help, >>> Bedda >>> >> >> >