Design bone flap for skull

Support
13

If you have a CT image as input then then a workflow like this should work:

  • Import the CT
  • Create a copy of the CT (by going to right-click and click Clone)
  • Mirror the CT around the LR axis by applying a transform in Transforms module that has -1 in the top-left corner and then click the harden button to harden that transform on the volume
    image
  • If the original and mirrored CTs are not aligned then harden the needed, align the original and the cloned image using registration method described on this page
  • Select the original CT as background volume (by clicking on the eye icon in Data module)
  • Go to Segment Editor module
  • Create a new segment, segment the skull using Threshold effect
  • Click “Show 3D” button to see the bone in the 3D view
  • Select the mirrored CT as master volume
  • Create a new segment
  • Use Threshold effect to specify editable intensity range (to limit painting to bone region)
  • Select Scissors effect
  • Choose Fill inside mode (so that region that are circled will be filled in the segment)
  • Choose Masking / Editable area → Outside all segments (to prevent the new segment overwriting the original bone shape)
  • Trace the boundary of the defect using Scissors in the 3D view