proj_thresh
proj_thresh is a command line utility that provides an alternative way of
expressing connection probability in connectivity-based segmentation. It is
run on the output of connectivity-based seed
classification mode within ProbTrack.
The output of Connectivity-based seed classification is a single volume for
each target mask, named seeds_to_{target} where {target} is replaced
by the file name of the relevant target mask. In these output images, the
value of each voxel within the seed mask is the number of samples seeded
from that voxel reaching the target mask.
proj_thresh is run as follows:
proj_thresh list_of_volumes threshold
Where the list of volumes is the outputs of Connectivity based seed
classification (i.e., files named seeds_to_target1 etc etc) and threshold is experessed as a number of samples
For each voxel in the seeds mask that has a value above threshold for at
least target mask, proj_thresh calculates the number of samples reaching each target mask
as a proportion of the total number of samples reaching any target mask. The
output of proj_thresh is a single volume for each target mask, names
??? where seed voxels will have values between zero and one.