Hi Cat - 1 out of 18 is the left CST. That one usually isn't hard to initialize b/c it's not a part of the brain where it's especially difficult to align a typical individual to the atlas. I'd wait to see the final outcome before declaring defeat, but is there any chance that the top of the brain or the brainstem are cut off in this subject?

a.y

On Mon, 14 Jan 2013, Cat Chong wrote:

Hello Experts

I am still at the first pre-proc step for Tracula and although the script is running, it seems to have difficulty initializing the first pathway (1 out of 18)

Please see below script excerpt: Is that normal that it takes this many trials to initiate a pathway? Cheers, Catherine WARN: Could not find satisfactory control point fit - try 171 Finding center streamline INFO: Step is 5 voxels WARN: Turning off FA check for center streamline INFO: Step is 5 voxels INFO: Length of center streamline is 111 voxels Selecting 5 points on center streamline INFO: Step is 4 voxels WARN: Defaulting to equidistant control points INFO: Selected control points are 96 100 30 106 108 58 116 109 87 113 102 115 108 105 146 INFO: Distances between consecutive points are 31 31 29 32 WARN: Could not find satisfactory control point fit - try 172 Finding center streamline INFO: Step is 5 voxels WARN: Turning off FA check for center streamline INFO: Step is 5 voxels INFO: Length of center streamline is 107 voxels Selecting 5 points on center streamline INFO: Step is 4 voxels