Hi Peggy - It's trying out all the paths from all the atlas subjects for candidates to use to initialize the path in your subject. If it's having such a hard time finding a good candidate, I suspect that something went wrong earlier in the pre-processing, something like a serious registration failure or a big chunk missing from the brain mask somewhere along this particular tract. I'll look into adding a "give up sooner" setting :)
a.y On Thu, 16 Jul 2015, Peggy Skelly wrote:
Hi, I'm using freesurfer-Darwin-lion-stable-pub-v5.3.0 and the latest version of tracula (downloaded Sept 2014). I was running 'trac-all -prior -c mydmrircfile.txt' with reinit=1 on a few tracts that initially reconstructed to look like single voxels. The log file indicated there was difficulty converging on a solution: INFO: Distances between consecutive points are 12 12 13 14 INFO: Selected control points in test subject's space are 161 100 154 163 104 142 159 105 130 159 101 117 160 91 107 INFO: Distances between consecutive points in test subject's space are 13 13 14 14 WARN: Could not find satisfactory control point fit - try 1435 Finding center streamline INFO: Step is 3 voxels WARN: Turning off deviation check for center streamline INFO: Step is 3 voxels WARN: Turning off FA check for center streamline INFO: Step is 3 voxels WARN: Turning off overlap check for center streamline INFO: Step is 3 voxels WARN: Turning off overlap check for center streamline The rest of the 50 GB file is the same last 2 Info and Warn lines. I was also sending the terminal output to a log file. So, it too contains 50GB of Info and Warn lines. It wasn't a very large hard drive to start with, but this did end up leaving the drive with 0 bytes of free space, which also caused the processes trying to write to the disk at the time to eventually crash (after reporting there is "no space left on device", many times). The tracts in question probably won't reconstruct well. But if you have time for a feature request, maybe you could detect that it hasn't or won't converge at this point? Thanks, Peggy
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