[Mristudio-users] all positive eigenvectors!

[Luca Pamparana]

This could be because of how ANALYZE mgiht be interpreting these
values. Could be an issue with coordinate handedness where it is
flipping two of the axes.

Cheers,
Luca

On Tue, Dec 22, 2009 at 4:18 PM, Mojdeh <zamyadim at sri.utoronto.ca> wrote:
> Thanks Susumu! I looked at the eigenvector file in the DTIstudio and it
> indeed has both + and - numbers! The problem is that when I save the
> file in the "Analyze"  format and open it  in MATLAB  all the values are
> between 0-1! I was thinking this is because the real x-y-z coordinate
> values are converted into RGB values, is this right? how can I access
> the actual coordinate values in MATLAB?
>
> Thanks a lot,
> Mojdeh
>
> Mojdeh 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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