Docs / SliceSeparation
Here we speak about the centre-centre slice separation (slice_spacing) as used in both DICOM and InterFile formats. For most other formats this is equal to the slice_width.
Whenever a conversion occurs to a format without a centre-centre slice separation parameter, the value of the slice_spacing (0x0018;0x0088) will be used as the new slice_width. See also
Hereby we set the gap/overlap between sequential slices to zero, thus eliminating the need for a separate centre-centre slice separation. Because we do lose the actual slice_width, this is merely done on multi-slice volumes, not on single-slice files.