[Mristudio-users] Fiber Tracking - FA along the selected fibers

[susumu]

Hangyi, correct me if it's wrong, but I believe that is because the tracking
terminates when the leading tip enters a pixel with FA lower than the
threshold. So, for each streamline, the two endpoints could have FA lower
than the threshold.

-----Original Message-----
From: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] On Behalf Of
dea.dundara at ts.infn.it
Sent: Thursday, January 22, 2009 5:51 AM
To: mristudio-users at mristudio.org
Subject: [Mristudio-users] Fiber Tracking - FA along the selected fibers

Dear,
I'm a new MRIstudio-user. Please sorry if I will repeat a question that
maybe has been asked before.
When I start to do Fiber Tracking, it appears a window where the
fiber-tracking parameters have to be defined,in particular I have to
specify the FA value at which the tracking will start and stop. I use the
default value of 0.25. After this I select fibers using a specific ROI.
But there is a problem. If I go to see the statistics, and I'm interested
in the FA along the selected fibers, I realize that the FA Min of ImgVal
is smaller than the threshold of 0.25 that I have set before.
Please explain me what is this minimum value refered to.
Thanks

Dea Dundara
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