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Dear Helmut, thanks for reporting this. This can be fixed by editing spm_reslice.m at line 257 and add: PO.n = [1 1]; This bug fix will be available in the next update of SPM12b. I would anyway recommend to use "3D to 4D File Conversion" to remove unwanted frames within a 4D volume before processing the data. Best regards, Guillaume. On 27/03/14 14:47, H. Nebl wrote: > Dear Rodolphe, > > > thanks for the quick reply! Yes, that's certainly the best solution, as the "ghost" volumes would also be contained in the following 4D niis generated during preprocessing, e.g. normalised ones (which is no problem as such, but nonetheless suboptimal, say someone else wants to work with the data). Just thought the 4D mean.nii is somewhat useless in the context of realignment ;-) > > For those who prefer the GUI, SPM's "3D to 4D File Conversion" also does do the job if you select relevant volumes from a 4D, which are then saved into another 4D. > > > Best, > > Helmut > -- Guillaume Flandin, PhD Wellcome Trust Centre for Neuroimaging University College London 12 Queen Square London WC1N 3BG