Hi,
I would like to do the unwarping with FUGUE. I have the two images, a Fieldmap
and the Magnitude image.
FLS says: The fieldmaps required by FUGUE must be in undistorted coordinates.
That is, the field map should not have any geometric distortion in it (or
negligible amounts) as can be obtained from a spin-echo sequence, or
gradient-echo sequences if the echo time is sufficiently small. The distortion
present in a sequence can readily be seen in the absolute (or magnitude) image
and normally manifests itself as a depression or extension of the inferior
frontal lobes (when the scans are acquired axially - it is different for other
acquisition planes).
Actually, as seen from the magnitude image, there are geometric distortions, in
my fieldmap...however I do not know how to correct them. Is it still possible to
correct them?
And if so, how can I do this? Probably it would be easier if you can see the
image. Is there a possibility to send the image (in a word dok or pdf)?
Thanks so much,
Julia
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