[Neuroimaging] Dipy Error in ROI Streamlines and Tracking

[Jacob Antony]

Hello,

I am having issues with reading a trackvis file into the pipeline for ROI
filtering: http://nipy.org/dipy/examples_built/streamline_tools.html
I have checked the affine of the .trk file's header and it is [0 0 0 0; 0 0
0 0; 0 0 0 0; 0 0 0 1]
However the .trk file and my DTI image have been registered together so
they should have the same affine. Ultimately this leads to an error when I
attempt to run utils.target
ValueError: streamlines points are outside of target_mask

This occurs when the include parameter is set to either true or false.
What could be the issue? I have included a google drive with the T1 image,
tractography file, corpus callosum mask, and the script I am using.

https://drive.google.com/folderview?id=0B02Ea96nn-Igb0dYbU5QazRoMEE&usp=sharing

Please let me know if you have an idea of what could be causing the error.
Thank you all!

Best,

Jacob Antony
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