I found the solution (thanks to the help of Michael Erb):
The problem is an incompatibility of pm_seed with SPM versions > SPM2,
as only the method 'huttonish' requires pm_seed and mark3d is standard
no one probably stumbled across this before.
Here is the quick solution for anyone who wants to fix his Fieldmap
Toolbox to handle all methods:
change the following code in pm_seed (line 45 to 50):
P = struct('dim', [dim 64],...
'pinfo', [1 0]',...
'mat', M);
to
P = struct('dim', [dim],...
'dt', [64 0],...
'pinfo', [1 0]',...
'mat', M);
this just fixes the structure of the volume to account for the changes
in spm_vol.
Yours,
Benjamin
>
> Benjamin Bender schrieb:
>> Dear SPM community,
>>
>> I am trying to unwrap a phase image with the help of the unwrap
>> function of the fieldmap toolbox and get the following error message:
>>
>> Error using ==> spm_conv_vol
>> Wrong sized dim.
>>
>> Error in ==> spm_smooth at 111
>> spm_conv_vol(P,Q,x,y,z,-[i,j,k]);
>>
>> Error in ==> pm_seed at 53
>> spm_smooth(P,svol,50);
>>
>> Error in ==> bb_unwrap at 187
>> seed = pm_seed(angvar,mask,pxs);
>>
>> When I display my image with spm, I get the following voxel size:
>> -0.513 0.513 3
>>
>> I believe the negative voxel size is the problem. I really wonder why
>> I got a negative voxel size and how to fix it? I used the dicom import
>> function of SPM to import my DICOM files just as I usually did.
>>
>> Any suggestions?
>> Benjamin
>>
>
--
Benjamin Bender
Abteilung Diagnostische und Interventionelle Neuroradiologie
Universitätsklinikum Tübingen
Hoppe-Seyler- Str. 3
72076 Tübingen
Tel. (07071) 29-85397
