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Dear Aditya, The first column is just an arbitrary number assigned to "label" the cluster. It is done so that the smallest cluster is number 1, the next smallest is number 2, etc. The second column is the number of voxels in that cluster. The third column is the maximum "statistic" value in that cluster. If the input was a z-statistic image then it is as it says (Z-MAX), but if the input is something else (e.g. a p-value or 1-p value image) then the "Z-MAX" is actually the maximum of whether these input values were. So "1-p-MAX" is probably the appropriate thing for your output (as it seems that all values are less than 1 so I assume you have input a 1-p image such as that generated by randomise). The "Z" for the other columns should be interpreted similarly. I hope this answers your questions. All the best, Mark On 21 Jul 2011, at 22:39, Aditya Kumar Kasinadhuni wrote: > Hello all, > > Can anyone please help me understand what the columns (Cluster index, voxels, z-max, z-max x, z-max y, z-max z) actually represent? I understand what they mean, but what I do not understand is how each of the first three columns complement eachother? > > Can anyone please use the following as an example to illustrate? > > Cluster Index Voxels Z-MAX Z-MAX X (vox) Z-MAX Y (vox) Z-MAX Z (vox) Z-COG X (voxZ-COG Y (vox) Z-COG Z (vox) > 21 4411 0.998 56 88 44 43.8 84.1 33.2 > 20 2884 0.998 27 65 39 25.8 65.5 38.5 > 19 1258 0.996 63 59 42 63.8 63.6 39.8 > 18 409 0.983 58 75 21 60.7 70.9 23.2 > 17 361 0.99 49 34 43 47.5 32.8 46 > 16 109 0.971 13 41 56 15.8 43 54.1 > 15 71 0.967 31 70 13 29.8 68.9 14.7 > 14 22 0.965 30 73 23 29.8 73.3 23.2 > 13 21 0.961 17 32 56 16.6 33 55.1 > 12 21 0.969 44 57 23 44.3 57 22.9 > 11 20 0.969 36 45 32 36.3 45.3 31.4 > 10 14 0.957 46 84 53 46.1 83.6 53.1 > 9 11 0.955 46 52 54 46.1 51.8 53.5 > 8 9 0.952 64 88 28 63.4 87.6 28.2 > 7 8 0.952 29 60 23 28.4 59 21.8 > 6 5 0.958 64 50 58 64.4 49.8 58.6 > 5 5 0.951 63 68 15 62.8 68.6 15.6 > 4 3 0.958 38 22 52 38.3 22 52.3 > 3 3 0.951 55 96 29 55 96 29 > 2 2 0.95 40 67 56 40.5 67 56 > 1 1 0.95 38 67 57 38 67 57 > > > Thank you. >