Sorry - no phase then no fieldmap.
Looks like all you've got is a second-rate magnitude image.
It is crucial to get at least two images or get complex images.
All the best,
On 9 Aug 2011, at 13:28, Dan-Mikael Ellingsen wrote:
> I have collected B0 field maps, but was only able to retrieve one file from the scanner computer (Philips 3T).
> Following is the fslinfo for this file:
> data_type INT16
> dim1 80
> dim2 80
> dim3 34
> dim4 1
> datatype 4
> pixdim1 3.0000000000
> pixdim2 3.0000000000
> pixdim3 3.2999999523
> pixdim4 0.0000000000
> cal_max 0.0000
> cal_min 0.0000
> file_type NIFTI-1+
> When I look at the image (slices), it looks like a magnitude image.
> Is it by any chance possible to do B0 unwarping with a magnitude image only (without a phase image) or is this a lost case?