I am not sure why your field would not load, but I would suggest updating to the current release.  That version is very old (4 years or so) and I am guessing any problems you are having have been straightened out in newer versions.  The clipped field should be mapped to a latvol if you want to convert it back to a .nrrd.

Darrell

On Aug 4, 2011, at 11:17 AM, Layla Houshmand wrote:

> Hi everyone,
>
> I am trying to use the ClipFieldToFieldorWidget module to extract the Diffusion Tensor Imaging data from just one part of the brain (the left Thalamus) .  I have .fld files of both the Thalamus and the DTI (they should already be aligned--they come from the same patient). I'd like to export this clipped DTI data as a matrix in Matlab, and I'd be interested in seeing what a .fld file looks like in Matlab also.  After playing around a little, I realized that ClipFieldToFieldorWidget returns an error without converting the DTI Field to an Unstructured Mesh first--the Left Thalamus Field is already an unstructured mesh.  As you can see, converting the clipped field to a Nrrd and then to a Matrix didn't work out. I end up with a MATLAB file that is unable to load, which is especially confusing as there are no errors in exporting the clipped field to MATLAB.  If anyone has any ideas about what I can do to make this code work I'd appreciate it!
>
> Best,
> Layla Houshmand
> Department of Biomedical Engineering
> University of Michigan

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