[Mristudio-users] Fw: Optic radiations

[Jun Yi Wang]

Hi Christian,

I tried to reply but the email was not delivered for some reasons.

Jun Yi


----- Forwarded Message ----
From: Jun Yi Wang <junyiwang2002 at yahoo.com>
To: mristudio-users at mristudio.org
Sent: Tuesday, October 28, 2008 1:30:03 PM
Subject: Re: [Mristudio-users] Optic radiations


Hi Christian,

The other papers might have used the CUT operation.  You can use the CUT operation placing at the two ends of the part of the fibers that you want to extract, e.g., one is placed near the LGN and another is placed in the middle of the fiber pathway.  But the result may contain fibers from other fiber tracts, such as the corpus callosum.  The CUT operation cannot be combined with other operations, so it will be difficult to delete fibers from other tracts if I understand these operations right.

Good luck,
Jun Yi Wang




________________________________
From: Christian Bieck <c.bieck at T-Online.de>
To: mristudio-users at mristudio.org
Sent: Tuesday, October 28, 2008 12:49:00 PM
Subject: [Mristudio-users] Optic radiations

Hello,

Since my last inquiry seemed to have escaped notice, I write you again 
in the hopes of finding a solution to my problem. 
As I wrote in my last email, I’m analyzing the FA values of the optic 
radiations and have, so far, extracted them by using 
anatomical landmarks and the DTIStudio functions AND, OR and NOT. The 
focus of my research concerns the posterior parts of the optic 
radiations ending in the primary visual cortex, but I find myself 
unable to extract them properly. Using the ROI-Operations in the Fiber 
Tab during Fiber Tracking oftentimes results in the removal of entire 
fiber tracts instead of just the anterior parts and any attempts to 
work with ROI Editor have not been successful so far. 
I have seen at least one paper in which the anterior/posterior parts 
and their FA values were examined via DTIStudio, so I know it’s 
possible, but I’m completely puzzled as how to actually do it. 
I would appreciate it *very* much if you could point me in the right 
direction. 
Thank you for your time. 

Cheers,
Christian Bieck


      
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