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Hi Paul, Yes, that's correct. Kind Regards Matthew > Hi Matthew, > > thank you. Just for clarification then, each of those local maxima are part of the total voxel size of the cluster (so in your example, the three "145" local maxima listed are single peak voxels, all part of the total 1237 voxels associated with the cluster? Thank you again. > > On Wed, Jan 6, 2016 at 10:55 AM, Matthew Webster <[log in to unmask]> wrote: > Hi Paul, > The local maxima are just single voxels who have the greatest value compared to their immediate neighbours in the cluster. They are all part of the same thresholded cluster. In the example output below, the top 3 local maxima for the cluster with index 145 ( which contains 1237 voxels ) are listed. > > Kind Regards > Matthew > > Cluster Index Voxels MAX MAX X (vox) MAX Y (vox) MAX Z (vox) COG X (vox) COG Y (vox) COG Z (vox) > 145 1237 24.7 30 9 9 31.3 13.8 8.18 > 144 86 10.4 18 25 10 19.1 26.1 11.4 > 143 60 5.27 27 34 14 23.9 35 13.7 > 142 35 10.7 42 22 10 43 22.9 9.92 > <snip> > > Cluster Index Value x y z > 145 24.7 30 9 9 > 145 24.3 35 9 7 > 145 23.1 31 10 7 > 144 10.4 18 25 10 > 144 5.43 15 26 10 > 144 4.26 24 26 14 > 143 5.27 27 34 14 > 143 4.59 22 34 12 > 143 3.8 23 34 14 > <snip> > >> Hi Matthew, >> >> thank you very much for the response. >> >> The lmax_zstat3.txt (and the same for my other contrasts) provides the cluster index, z- value, and x/y/z coordinates. However, the voxel size of each of these local maxima clusters still seems to be missing (for example, I have 5 local maximas falling under the cluster index of 5, and I'd like the cluster size of each). When I look up the main cluster table (cluster_zstat3_std.txt; the same from the html provided by FEAT), the voxel size is only listed for each cluster index: >> >> Cluster Index Voxels .... >> 5 5020 >> 4 1240 >> 3 1101 >> 2 989 >> 1 345 >> >> but each cluster index, has multiple local maxima listed on the cluster_zstat3_std.html, and it is with getting the voxel size of each of these local maximas that I am having trouble with. Thank you again. >> >> On Wed, Jan 6, 2016 at 7:56 AM, Matthew Webster <[log in to unmask]> wrote: >> Hello Paul, >> The local maxima information ( e.g. in lmax_zstat3.txt ) will give a cluster index for each maxima - this can then be looked up in the main cluster table output. >> >> Hope this helps, >> Kind regards >> Matthew >> >> >>> Greetings FSL community, >>> >>> sorry for reposting a question, but I'm having issues being able to report the voxel size for each cluster index of the local maxima reported from a FEAT analysis. I've done the FEAT analysis, and would like to report the local maxima, their associated regions of activity based on their coordinates, and voxel size. I've been using the cluster command with the option to output the local maxima (number = 5) text file: >>> >>> cluster -i thresh_zstat3 -t 2.3 -n 5 --mm --olmax=lmax_zstat3.txt >>> >>> the output matches that from the FEAT report, but not the local maxima information. I was hoping to report the cluster size (voxels) of each local maxima found in each cluster index (if that makes sense...). I feel like I'm missing something easy, but not been able to get the output I was hoping for. >>> >>> Any help with this would be greatly appreciated. Thank you. >> >> > >