[Mristudio-users] Eddy currents correction

[susumu mori]

Eddy current causes image distortion including translation, scaling, and
sheering.
patient motion causes image translation and rotation.

Sometimes it is difficult to distinguish translation by eddy current and
patient motion.

Both (eddy and motion) cause image registration issue, which are
simultaneously corrected by post-processing image registration.
If you use "rigid transformation" for the post-processing image
registration, you can correct only translation and rotation (motion and a
part of eddy current distortion).
If you use "affine", in theory, you can correct all of them at once.



On Wed, Jan 30, 2013 at 3:30 PM, Dorian P. <alb.net at gmail.com> wrote:

> Hi all,
>
> I sent this question before and would appreciate any comment on it.
>
> It looks like eddy current correction is applied in DTIstudio only for
> affine registration (not for rigid body). This is true for AIR and Mutual
> Registration as far as I know. Is there a particular reason for this? Why
> not applying eddy current correction for rigid body too?
>
> Thank you.
>
> Dorian
>
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