Hello FSL experts!
I have a question concerning the *proj_thresh* function.
There is not so much on the site and neither in the forum.
Is correct to use it as a within-subject tool in order to evaluate the
seeds going from a given seedmask to differnt target masks
list of volumes :
subject1_seed1_2_target1
subject1_seed1_2_target2
subject1_seed1_2_target3
subject1_seed1_2_target4
etc
or is it a between-subject tool to evaluate the seeds coming from the
same seedmask and going to the same targe mask?
subject1_seed1_2_target1
subject2_seed1_2_target1
subject3_seed1_2_target1
subject4_seed1_2_target1
etc.
On the website it says:
For each voxel in the seeds mask that has a value above threshold
*[which I have do define, e.g. if I have 20 subjects I take 20.
Correct?]* for at least one 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.
What disturbed me was that I got for each subject[xy]_seed1_2_target1
a volume s[xy]_myseed_seed_proj_seg_thr_14.nii.gz and each one looks
different...
I seem not to understand this function.
Could anyone explain a little bit please?
Thanks a lot!!
Markus
--
Dr. med. Markus Gschwind, M.D.
Laboratory for Neurology and Imaging of Cognition
Dept of Neurosciences
University Medical Center (CMU)
1 Michel-Servet - 1211 GENEVA - CH
Tel 0041 (0) 22 379 5324
Fax 0041 (0) 22 379 5402
email: [log in to unmask]
http://labnic.unige.ch
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