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I think dim4 should be time... I'm not sure what the other dimensions are for... Try editing the header to correct the missing/incorrect info. David -----Original Message----- From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Lisa Eyler Sent: Thursday, July 30, 2009 2:20 PM To: [log in to unmask] Subject: Re: [FSL] registration problem within MELODIC Thanks for the suggestion. It looks like it "sees" that dim5 = 67 (which is the number of time points) but the time_units are Unknown. Is dim5 usually time, or is it dim4? Perhaps I should use fsledithd to fill in some of the blanks? I've also posted on the AFNI list to see if there's anything I can do on that side of things. Lisa sizeof_hdr 348 data_type FLOAT32 dim0 5 dim1 64 dim2 64 dim3 31 dim4 1 dim5 67 dim6 1 dim7 1 vox_units mm time_units Unknown datatype 16 nbyper 4 bitpix 32 pixdim0 0.0000000000 pixdim1 4.0000000000 pixdim2 4.0000000000 pixdim3 4.0000000000 pixdim4 1.0000000000 pixdim5 1.0000000000 pixdim6 0.0000000000 pixdim7 0.0000000000 vox_offset 7536 cal_max 0.0000 cal_min 0.0000 scl_slope 0.000000 scl_inter 0.000000 phase_dim 0 freq_dim 0 slice_dim 0 slice_name Unknown slice_code 0 slice_start 0 slice_end 0 slice_duration 0.000000 time_offset 0.000000 intent Unknown intent_code 0 intent_name intent_p1 0.000000 intent_p2 0.000000 intent_p3 0.000000 qform_name Scanner Anat qform_code 1 qto_xyz:1 -4.000000 0.000000 -0.000000 130.417007 qto_xyz:2 0.000000 -4.000000 -0.000000 154.716995 qto_xyz:3 0.000000 0.000000 -4.000000 87.712196 qto_xyz:4 0.000000 0.000000 0.000000 1.000000 qform_xorient Right-to-Left qform_yorient Anterior-to-Posterior qform_zorient Superior-to-Inferior sform_name Scanner Anat sform_code 1 sto_xyz:1 -4.000000 0.000000 0.000000 130.417007 sto_xyz:2 0.000000 -4.000000 0.000000 154.716995 sto_xyz:3 0.000000 0.000000 -4.000000 87.712196 sto_xyz:4 0.000000 0.000000 0.000000 1.000000 sform_xorient Right-to-Left sform_yorient Anterior-to-Posterior sform_zorient Superior-to-Inferior file_type NIFTI-1+ file_code 1 descrip aux_file