Hi - I can't replicate this problem - even if I put different sized
images into SIENA, this all works correctly. Are you definitely using
the latest version of FSL?
Cheers.
On 11 Mar 2008, at 10:23, Antonios - Constantine Thanellas wrote:
> Hi Steve,
> After checking more carefully my data again i noticed that even if my
> original data A and B are of the same voxel dimensions, the
> A_to_B_flow.nii.gz and B_to_A_flow.nii.gz images have different
> dimensions
> and this probably causes the error message:
>
> Image Exception : #3 :: Attempted to subtract images/ROIs of
>> different sizes
>> terminate called after throwing an instance of
>> 'RBD_COMMON::BaseException'
>> /usr/lib/fsl/siena_flow2std: line 121: 14112 Aborted
>> (core
>> dumped) ${FSLDIR}/bin/fslmaths ${A}_to_${B}_flow_dil -sub
>> ${A}_to_${B}_flow_dilback -div 2 ${A}_to_${B}_flow_dil
>
> when i run siena_flow2std script.
> What can cause A_to_B_flow.nii.gz and B_to_A_flow.nii.gz images to
> have
> different voxel dimensions even if A and B are of the same
> dimensions?Can i
> trust the results of siena for the A_to_B_flow.nii.gz and
> B_to_A_flow.nii.gz
> images? Shouldn't they be of the same dimensions?
> If yes do you think it's a good approach to manually change the
> dimensions
> of the A_to_B_flow.nii.gz and B_to_A_flow.nii.gz images in order to
> be of
> the same size and then proceed with siena_flow2std script?
>
> Thank you
> Antonios-Constantine Thanellas
>
>
>
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
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