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Dear Mark, The image that you are using as the input to cluster is a *corrp* image, which is a corrected p-value image (as output by randomise, storing the 1-p values). Therefore this image does not contain any t or z values. If you have run a randomise analysis then the corrected p-values are the most relevant outputs and people normally just report this, as there is often no equivalent of a parametric z-value or t-value when performing such non-parameteric tests with multiple-comparison correction in randomise. I hope this helps. All the best, Mark On 4 Apr 2014, at 10:15, Mark <[log in to unmask]> wrote: > Hi FSL experts, > > I performed Randomise for a small-volume correction in a ROI and use the Cluster command below to get local maxima: > > cluster -i filename_clustere_corrp_tstat1.nii.gz -t 0.95 --mm -n 10 --olmax=lm.txt > > However, in the lm.txt, it only output x/y/z without t or z values of the local maxima. How can I get retrieve these values? > > Thanks. > > Mark