I've got a directory of numbered DICOMs where each file is a single slice in a reconstructed breast tomosynthesis image. The files are numbered

• image.0.dcm
• image.1.dcm
• image.2.dcm

etc. If these are all in a directory named "slice_dir", then using dcm2nii I can run

$ dcm2nii slice_dir

and it combines them all into a single .nii.gz file. I can't figure out how to do the same thing using dcm2niix. I've tried a number of different combinations of parameters, but in each case what it does is convert each separate dcm into its own nifti file. Instead of, say, a single nifti file with 60 slices, I get 60 nifti files, each with a single slice.

Is this operation still supported in dcm2niix? If so, how do I do it?

Thanks.

Walt