[Mristudio-users] units?

[Shereen, Ahmed (shereeda)]

Thank you,

I have another question.  Sometimes when I draw ROIs not all of the pink pixels become part of the ROI object when I push the (Add(a)) button.  I check the statistics box to double check that it is not just a visual misplacement.  The number of pixels also does not increase from the statistics gui, although extra pixels were selected prior to pushing Add(a).

Any ideas?
Again, thank you,
Duke
________________________________________
From: mristudio-users-bounces at mristudio.org [mristudio-users-bounces at mristudio.org] on behalf of Xin Li [xli16 at jhmi.edu]
Sent: Friday, August 28, 2009 4:14 PM
To: DTI Studio, ROI Editor,     Landmarker Questions/Support
Subject: Re: [Mristudio-users] units?

Hello,

The current version of ROIEditor reports the statistical result as four decimal precision. When your eigenvalue data are very small, this problem happens. You may scale the eigenvalue data before the statistical caculation.

Xin

----- Original Message -----
From: "Shereen, Ahmed (shereeda)" <shereeda at mail.uc.edu>
Date: Friday, August 28, 2009 1:26 pm
Subject: [Mristudio-users] units?
To: "mristudio-users at mristudio.org" <mristudio-users at mristudio.org>


>  Hello,
>  I have a problem which I think has to do with the units for the
> eigenvalues calculated in ROIEditor.  Basically, when I draw ROIs,
> save them, and then load them into the FA image, everything works
> fine.  When I then load the eigenvalue images, the ROIs that gave me
> good FA values give me the same eigenvalues for all ROIs.  I'm
> attaching the ROI data file.  Has anybody seen anything like this?
>  Thank you,
>  Duke
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