I'm afraid we cannot really tell what is going wrong just from this
information. The command line is fine.
If you look at intensities in the phase image (using FSLVIEW) on
either side of an obvious phase wrap - are they different by 6.28?
(i.e. 2*pi) If not, then either the input image is not scaled
correctly,
or these are not normal phase wraps.
It is also possible that the masking is not working well (based on the
absolute image). If that is the case it might be improved by using
your own mask (via the -m option).
If none of this helps, please let us know and we can have a look
at the data.
All the best,
Mark
On 27 Nov 2006, at 13:08, Daryl E. Bohning wrote:
> I tried feeding prelude a phase map in radians (option -p), and a
> modulus (option -a) image, and expected to get as output an
> "unwrapped" phase map in some form, but when I looked at the output
> (option -u) with FSLVIEW, it looked the same as the input phase
> image!? What am I doing wrong?
>
> "prelude -a $modfile -p $fazfile -u uwpfile -f -v"
>
> Thanks,
> Daryl
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