Operating system: 3D slicer
Slicer version: 5.8.1
Expected behavior: I am trying to segment the occipital bone of a Head CT. I set the initial threshold to 226-3071 in order to capture the skull bone. I think use the cutoff of 700 HU for the cortical and subtract that from my occipital total to get the bone marrow. However, the bone marrow region is coming out on the outside of the cortical region. I assume this is an issue with my initial threshold. If anyone has any advice that would be greatly appreciated!
Actual behavior: