Mark,
I am currently uploading the file, think it will take a while, the reference
number is 697212.
The artificats/shearing/ghosting of images does not occur in the
registration process, but when the fieldmap is applied to the data. I tried
applying a 2D registered fieldmap today and this seems to take care of most
of the problem, but there is still a slight amount in the front and back of
the head. Included in the file are an eddy corrected unwarped dti using a
non-registered fieldmap, an eddy corrected unwarped dti using the 2D
registered fieldmap, and the corresponding fieldmap images. I you would also
like the original or eddy corrected dti files let me know.
In the registration process, should the fieldmap be registered to the
original dti B0 or the eddy corrected? I assume this wouldn't make much of a
difference though.
Thanks,
Carlos
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