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T O P I C R E V I E W
Bethany	Posted - May 23 2008 : 8:21:49 PM OK, I'm sure there's a totally straightforward way to do this, but I haven't been able to figure out what. I want to use Matlab to look at my FSL data, at specific MNI coordinates, which means converting said MNI coordinates to voxel space. How do I do this? I've been trying mni2srs but playing with the various numbers doesn't seem to be helping me.
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dvsmith	Posted - May 24 2008 : 11:34:06 AM I think this should work with FSL data in 2x2x2mm standard space, but someone correct me if I'm wrong. I tested this on a few voxels in MRIcron and it seems to work fine... function voxelspace = mni2voxel(inputvoxel) %inputvoxel should be [x y z] MNI coordinates %my assumptions: %voxel size == 2mm iso %datasize=(91,109,91) %mniorigin=[46 64 37] %identified as MNI coordinate [0 0 0] in MRIcron for fsl standard brain mniorigin=[46 64 37]; yourvoxel=inputvoxel/2; voxelspace = yourvoxel + mniorigin; Obviously this could be made more flexible by loosening the hard coded assumptions... David

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