In some of my segmentations my NRRD files have an extra dimension (4th dimension). This has caused issues with compatibility with certain software loading the file up. Would anyone know how to remove this extra dimension so that the file only has 3 dimensions?
You mean you are trying load the segmentation you did in Slicer (*.seg.nrrd file) into a some other software? If that’s the case, you will probably be better off exporting the segmentation as a labelmap and try.