Hello,
I'm trying to use the Image Calculator built into SPM 5 to mask voxels
below a certain threshold. As recommended in the SPM 5 manual, I
used the ImCalc to create a binary mask of the image (i1>threshold)
and multiplied that times the original image (
i1.*(i1>threshold)). Insignificant voxels should get multiplied
by 0 in this case, but when I view the resulting, masked image in
software like mricro, all the below threshold voxels are still
present. Has anyone had a similar problem? Am I using the
calculator incorrectly?
Thanks in advance for your help?
-eric
Eric H. Schumacher,
Ph.D.
School of Psychology
Georgia Institute of Technology
654 Cherry Street
Atlanta, GA 30332-0170
phone: 404-894-6067
lab: 404-385-7056
fax: 404-894-8905
email:
[log in to unmask]
website:
www.psychology.gatech.edu/CoNTRoL
