cluster will make a file where the clusters are given different values 1,2,3 etc. in order of their size.

You can then use fslstats and fslmaths to threshold this image to give you just the biggest one

On 23 Apr 2010, at 04:58, Matt Glasser wrote:

Hi,

I am wondering if one of the fMRI tools has a function that will output the largest region of contiguous voxels in a new file. I have generated a volume with clusters of 1s and I want to extract the largest one of these and put it into a separate file.

Thanks,

Matt.