Hi Christoph,
if you load the two magnitude images and the one phase difference map
into the toolbox, you will see that you can go ahead with the
calculation. The toolbox will expect the one phase map to be a phase
difference map, and will treat it accordingly.
Cheers,
Marko
Christoph Berger wrote:
> Dear SPMers,
>
> I want to get a voxel displacement map (.vdm file) to use this map during realign unwarp to correct for static B0 field inhomogenities.
>
> During some runs on a Siemens VERIO we only measured the gradient field map phase difference image and not a magnitude image.
>
> Is it possible to obtain a .vbm file from the phase difference image only? Is this realisable also with the FiledMap toolbox (http://www.fil.ion.ucl.ac.uk/spm/toolbox/fieldmap/)?
>
> Kind regards,
> Christoph Berger
>
> Universität Rostock
> Zentrum für Nervenheilkunde
> Klinik und Poliklinik für Psychiatrie und Psychotherapie
> Gehlsheimer Strasse 20, 18147 Rostock
>
--
____________________________________________________
PD Dr. med. Marko Wilke
Facharzt für Kinder- und Jugendmedizin
Leiter, Experimentelle Pädiatrische Neurobildgebung
Universitäts-Kinderklinik
Abt. III (Neuropädiatrie)
Marko Wilke, MD, PhD
Pediatrician
Head, Experimental Pediatric Neuroimaging
University Children's Hospital
Dept. III (Pediatric Neurology)
Hoppe-Seyler-Str. 1
D - 72076 Tübingen, Germany
Tel. +49 7071 29-83416
Fax +49 7071 29-5473
[log in to unmask]
http://www.medizin.uni-tuebingen.de/kinder/epn
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