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¥The result:
HThis example thresholds the dataset on subrick #2 (Ôfunc_fred+tlrc[2]Õ) at F-value 300 (-1thresh 300)
HClusters together all the surviving nonzero voxels using a contiguity test of 1mm and keeping only clusters at least 200 mm3 in volume (-1clustorder 1 200)
HAll voxels in the largest cluster are assigned value 1 (say, 1200 voxels in one cluster), the second largest are assigned value 2 (say, 920 voxels in one cluster), etc., and the result is written to disk in dataset clust_roi+tlrc
¥You can use this dataset as a mask, edit it with the drawing plugin, etcÉ