Someone has generated a group average field map and used it to partly
correct EPI distortion, but unfortunately I donšt know exactly how they
did it.
Peace,
Matt.
On 7/31/14, 6:21 AM, "H van Steenbergen"
<[log in to unmask]> wrote:
>Dear FSL users,
>
>Due to an error in the fsl_nii export script of our Phillips Achieva
>scanner for 3 out of my 30 subjects I have only a partial field of view
>(lower half of the brain only) for my B0 data. When I try to use the
>partial volume in feat, B0 unwarping fails. Is it still possible to use a
>B0 correction for these subjects? I really want to keep the 3 subjects in
>my analyses.
>
>An alternative way might be to get an average of the other 27 subjects
>and replace the upper half of the brain for these subjects with the
>average B0 maps. Would that be the best solution? Other suggestions?
>
>Thanks for your help!
>
>Best,
>
>Henk van Steenbergen
|