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Hello, 

I am trying to create a thresholded mask of Uncinate Fasciculus (under the JHU White matter Tractography atlas).

I created the mask using the FSL atlas. But when I try to threshold it to 75%, I get nothing. The resulting file ends up being a matrix with all zeros.

I have done similar steps for sub cortical structures (eg, Hippocampus) under the Harvard Oxford Subcortical structure atlas and I get the thresholded masked image.  The step works for the sub cortical structures.


I save the structure from the atlas using 1mm standard brain as the underlay.

To threshold I use this command:

fslmaths UncinatefasciculusL -thr 75 UncinatefasciculusL75


Am I doing this right?



Thank you.
--
Regards,
Mithra

Imaging Research Center
University of Texas, Austin
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