[Mristudio-users] how to get whole-brain FA

[susumu]

Hi Julie,

If you want the whole-brain FA, I assume it's not based on tractography.
Then, as Xin suggested, I would recommend to use RoiEditor. You can
delineate the entire brain using b0 image and intensity threshold or region
growing tool. This (delineated brain) can be used as a masking. You can
apply the mask to an FA map. Or, you can threshold FA directly using
something like FA>0.25. In this way, you can get statistics within the
masked area such as average FA of the whole brain. I believe you can export
the data to a text file from which you can create a histogram using Exel.

-----Original Message-----
From: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] On Behalf Of JULIE E MCENTEE
Sent: Tuesday, June 17, 2008 6:26 PM
To: mristudio-users at mristudio.org
Subject: [Mristudio-users] how to get whole-brain FA

Hello Group,

Is there a way to get whole-brain FA statistics using DTI-Studio under
Fber-Tracking? I am able to input my fa and eigenvector files, but when I
click the Statistics button under the fiber tab and choose the fa file, I
get "N/A".

If anyone knows of another/better way to get whole-brain FA, please let me
know.

Also, is the a way to change the size of the images in the gui? The images
of my data are VERY small, and zooming does not help.

Thank-you for your help,

Julie

Julie E. McEntee, M.A., C.C.R.P.
Senior Research Program Coordinator
Department of Psychiatry- Neuroimaging
Johns Hopkins University School of Medicine
600 N. Wolfe St./ Phipps 300
Baltimore, MD 21287
Phone: 410-502-0468
Fax: 410-614-3676
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