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Thanks for quick answear. I don`t know. The data for the standard space image and the self-made mask are here: pintzka@linux-sopg:/media/ubuntu/Navigasjon/ROI_masks> fslinfo MNI152_T1_2mm_brain data_type INT16 dim1 91 dim2 109 dim3 91 dim4 1 datatype 4 pixdim1 2.0000000000 pixdim2 2.0000000000 pixdim3 2.0000000000 pixdim4 1.0000000000 cal_max 8000.0000 cal_min 3000.0000 file_type NIFTI-1+ pintzka@linux-sopg:/media/ubuntu/Navigasjon/ROI_masks> fslinfo MTL-mask_square2_bilateral data_type INT16 dim1 91 dim2 109 dim3 91 dim4 1 datatype 4 pixdim1 2.0000000000 pixdim2 2.0000000000 pixdim3 2.0000000000 pixdim4 0.0000000000 cal_max 1.0000 cal_min 0.0000 file_type NIFTI-1+ Siterer Tim Behrens <[log in to unmask]>: > Sounds to me as if your self-made mask was not the same size as the > standard space image you are using. > > Your results will be in this space, and therefore so should your mask be. > > Cheers > > T > > > On 15 Feb 2008, at 13:26, Hallvard Røe Evensmoen wrote: > >> When trying to use a self-made binary MTL mask on a third level >> analysis in FSL, we got this error message: >> /usr/local/fsl/bin/fslmaths thresh_zstat1 -mas >> /media/ubuntu/Navigasjon/ROI_masks/MTL-mask_square2_bilateral.nii.gz >> thresh_zstat1 >> Image Exception : #3 :: Attempted to multiply images/ROIs of different sizes >> terminate called after throwing an instance of 'RBD_COMMON::BaseException' >> >> And the output were as if we not had used any mask at all.... >> >> Anyone got any suggestions about what might have gone wrong?, and we >> would be grateful to hear. >> >> Hallvard Røe Evensmoen >>