If I have say 6 b=0 images and I want to average them I would simply coregister them (6 dof) then add and divide by 6, correct?
...and this will give me a 6*sqrt(2) increase in SNR?
Just want to make sure Im not missing anything.
Dustin
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From: FSL - FMRIB's Software Library [[log in to unmask]] On Behalf Of Andreas Bartsch [[log in to unmask]]
Sent: Thursday, April 19, 2012 5:47 PM
To: [log in to unmask]
Subject: Re: [FSL] DTI: Order of Eddy_correction vs. Unwarping
Hi Pete,
this is good!
Cheers,
Andreas
PS: You don't really need 2.c, do you?
Am 19.04.12 15:38 schrieb "Peter Fried" unter <[log in to unmask]>:
>Hi FSL Community,
>
>Can someone confirm the appropriate order of pre-processing steps for DTI
>data?
>
>Specifically, does it matter whether the unwrapping (using the pre-stats
>option in FEAT) occurs before or after the eddy_correction?
>
>Here is what I have been doing and I just want to make sure it's correct:
>
>#1. Eddy Correction
>#2. Feat Pre-stats
> a. Unwarp
> b. bet
> c. Registration
>#3. dtifit
>#4. bedpostx
>
>Thanks!
>
>Cheers,
>Pete Fried
>
>Department of Anatomy & Neurobiology
>Boston University School of Medicine
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