[Mristudio-users] all positive eigenvectors!

[susumu mori]

Hi Mojdeh,

Please load the eigenvector file into DtiStudio as a "vector" file and read
the pixel-by-pixel values at the bottom of the window by placing the cursor.
If you find that the vector file does contain both positive and negative
elements, then, the problem seems to be the file reading by MatLab.

Susumu

On Thu, Dec 17, 2009 at 1:09 PM, Mojdeh <zamyadim at sri.utoronto.ca> wrote:

> Hi there,
>
> I have 49 slice DTI image of brain with 2 B0 +  23 gradient directions.
> I loaded the image and calculated the tensor, eigenvectors, ... for the
> image and then save the results in analyze format. However, when I load
> the eigenvectors into MATLAB and look at the x-y-z coordinates of
> eigenvectors they are all positive numbers which doesn't make any sense
> to me! Does anyone know what might be the problem?
>
> Thanks a lot in advance,
> Mojdeh
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