Hello,

I am a new Caret user, and I am a bit confused by a couple of things that I am 
hoping can be easily clarified. 

First, we use Linux as our primary computer operating system. In the Linux 
environment, I am getting Caret files to load, but the images are either not 
visible at all or they are distorted in some fashion. When I use Caret in 
Windows, this problem disappears; however, I need to use the Caret-AFNI 
interface, and AFNI does not operate in a Windows environment. Do you know of a 
program, a patch, or the like, that will allow the Caret images to appear 
appropriately when used in the Linux environment? Alternatively, do you know of 
a way to interface the Windows version of Caret with AFNI that is running in 
Linux? 

When I import MPRAGE files from AFNI into Caret in the Linux environment using 
your directions in the segmentation tutorial, however, the images actually look 
fine and I am able to crop the brain nicely. When the brain segmentation 
process begins, however, it inevitably fails. It appears that when the 
parameters for voxel size are adjusted to the required size, the image is 
degraded and the program can no longer distinguish between white and gray 
matter sufficiently, though this is just an educated guess as to what is 
happening. I had thought that ANFI would automatically size the voxels 
appropriately, but it apparently does not do so. Is there a remedy for this 
problem, or am I committing a fatal error somewhere? Is it possible that this 
problem is a result of our scan resolution as opposed to an AFNI-Caret problem? 
(I think that our scan resolution is fairly standard, so I suspect this not to 
be the case.)

Thank you very much for your time and your help. I am looking forward to using 
Caret as soon as we get these kinks worked out. It is a very impressive program.

Cheers,

Joanna Hutchison



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Joanna Hutchison, Ph.D.
Department of Psychiatry-University of Texas Southwestern Medical Center
School of Behavioral and Brain Sciences-University of Texas at Dallas
Center for BrainHealth-University of Texas at Dallas



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