[Mristudio-users] Late Stage AIR?

[jonathan grynspan]

please remove me from msiling list
 
> Date: Thu, 28 May 2009 12:17:31 -0700
> From: dylan.alegria at gmail.com
> To: mristudio-users at mristudio.org
> Subject: [Mristudio-users] Late Stage AIR?
> 
> Hi,
> I'm still a novice with DTIStudio, and I've run into a concerning 
> issue during fiber-tracking. We collected a 30 direction DTI sequence 
> with 2 repetitions on 25 subjects and have run it through DTI Studio 
> to do fiber tracking. We did not initially register with AIR because 
> we believed that our subjects were reasonably aligned and we didn't 
> want to add artifacts from registration if we didn't have to.
> 
> While drawing ROIs for fiber tracking some differences in tilting are 
> obvious. We are considering running AIR on the processed data to 
> remedy this problem. This brings me to 3 questions.
> 
> 1) Given that fiber tracking operates in a 3D space, how important is 
> it to have subjects in exactly the same alignment for drawing the seed 
> ROIs?
> 2) Is it possible to register the FA/Eigenvector/etc. images without 
> recalculating them, or going back and re-flagging bad slices?
> 3) Is it of vital importance to run AIR before doing the quality 
> checks for some other reason than having similarly aligned subjects?
> 
> Any help would be greatly appreciated. Thank you very much in advance!
> 
> Dylan
> 
> 
> Dylan Alegria
> CIBSR Imaging RA
> Stanford University
> dalegria at stanford.edu
> (650) 736 0732
> 
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