Dear users,
I'm using the FieldMap toolbox for the first to to create vdm images for use
with realign and unwarp in spm5.
The toolbox seems to require either 2 images (single phase and single
magnitude) or 4 images (long/short TE phase and long/ short TE magnitude).
The fieldmap data I've acquired (on a 3T siemens trio) comprises of: long TE
phase, long TE magnitude and short TE magnitude images.
I'm not sure if I should be loading both the long echo time images as a
single phase/magnitude image (effectively loading them in the required short
TE data input fields) or whether I should have an extra short TE phase image.
I've tried the former and the resulting fieldmap looks okay, but I'm not
sure if that is the correct procedure.
I'd be very grateful if anyone could advise on this issue.
Thank you.
Regards, Jac
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