Can't be because it depends on when the subject moves their eyes. The only good way to deal with this is to acquire with RL phase encoding, but that will make your life more difficult for other reasons....
Stefano Marenco, MD
NIMH/CBDB
10 Center Drive, Bldg 10 room 3C103
Bethesda MD 20892
Tel 301 435-8964
Fax 301 480-7795
Email: [log in to unmask]
-----Original Message-----
From: Matt Glasser [mailto:[log in to unmask]]
Sent: Wednesday, October 03, 2012 2:23 PM
To: [log in to unmask]
Subject: Re: [FSL] TBSS effect of ghosting from eyes in FA images
Are they the same in all DWIs and b0s?
Peace,
Matt.
On 10/3/12 1:06 PM, "Christopher Barth" <[log in to unmask]> wrote:
>Hello,
>
>We are conducting a large cognitive study and are planning to use the
>TBSS registration tool within FSL. Unfortunately, a limited number of
>the subject images within the study have ghosting of the eyes in the
>cerebellum resulting in high intensity regions in the corresponding
>locations of their FA images. Will the algorithm used within FSL for
>TBSS registration account for these circumstantial high intensities or
>would it be beneficial for our team to write a counter process to
>remove these regions?
>
>Thanks for the help,
>Christopher Barth
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