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Dear Yune, just use the image calculator with the spm_T*.img as imput image and the expression "i1 .* (i1>thres)" where thres is the threshold you want. You can use the output image as ROI mask. Good luck, Kai Yune Lee wrote: > > Hello, > I'm a novice for the spm2 and I'm trying to define an ROI based on > the T value in the spmT. img. > Can someone tell me how to get the voxels whose T value is bigger > than any value (e.g., T> 7.4)? > Your help would be much appreciated. > Thanks! > > -- Dr. Kai Lutz Neuropsychology Institute for Psychology University of Zurich Binzmühlestrasse 14 /Box 25 CH-8050 Zürich Switzerland