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Yep, that the reconstructed dti from siemens - each value is a direction weighted by the FA - conversion to niifi with dcm2niix -- Dr Cyril Pernet, Senior Academic Fellow Neuroimaging Sciences Centre for Clinical Brain Sciences Chancellor's Building, Room GU426D The University of Edinburgh 49 Little France Crescent Edinburgh BioQuarter EH16 4SB [log in to unmask] tel: +44 (0)131 465 9530 http://www.sbirc.ed.ac.uk/cyril http://www.ed.ac.uk/edinburgh-imaging -----Original Message----- From: Flandin, Guillaume <[log in to unmask]> Sent: 21 November 2019 15:14 To: PERNET Cyril <[log in to unmask]>; [log in to unmask] Subject: Re: [SPM] spm_slice_vol - unknown datatype Dear Cyril, Data type 128 corresponds to NIFTI_TYPE_RGB24. How did you convert the image to NIfTI? Do you have any reason to expect multiple values per voxel for these data? Best regards, Guillaume. On 21/11/2019 14:46, PERNET Cyril wrote: > Dear Guillaume, John, . > > > > Hope you can advice a work around this one .. > > > > spm_coreg(V(T1w),V(some Siemens reconstructed image), flags) returns > an error due to data type (dt [128 0]) > > > > Error using spm_slice_vol > > Unknown datatype. > > > > Error in spm_coreg>loaduint8 (line 238) > > img = spm_slice_vol(V,spm_matrix([0 0 p]),V.dim(1:2),1); > > > > Error in spm_coreg (line 141) > > VFk.uint8 = loaduint8(VFk); > > > > spm_vol returns > > > > V = > > > > struct with fields: > > > > fname: 'xxxx_DTI_ColFA_echo1.nii' > > dim: [128 128 74] > > dt: [128 0] > > pinfo: [3×1 double] ß[1 0 NaN] > > mat: [4×4 double] > > n: [1 1] > > descrip: 'TE=0;Time=112056.083;phase=1' > > private: [1×1 nifti] > > > > Thx > > Cyril > > > > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. -- Guillaume Flandin, PhD Wellcome Centre for Human Neuroimaging UCL Queen Square Institute of Neurology London WC1N 3BG