Walkthrough: Volumetric Modeling of PAO Adjustments

Volumetric Modeling of Periacetabular Osteotomies

The xreg-pao-create-repo-vol tool allows periacetabular osteotomies to be modeled volumetrically, both shape and rigid movement, which enables simulation studies incorporating Hounsfield units and soft tissue.

A comprehensive listing of the program's usage may be obtained by passing -h or --help.

Example

Data created from the following examples will be used as input to this example:

• The pelvis.nii.gz volume created in the volume cropping example
• The fragment created in the first example for PAO fragment creation
  • pao_cuts_seg.nii.gz
• A random movement of the fragment and femur from the example on random PAO fragment and femur movements
  • test_pao_frag_0.h5
  • test_pao_femur_0.h5

The following command will create a CT volume incorporating the osteotomies and movement of the fragment:

xreg-pao-create-repo-vol pelvis.nii.gz pao_cuts_seg.nii.gz pelvis_app_lands.fcsv left test_pao_frag_0.h5 test_pao_femur_0.h5 pao_vol.nii.gz

The output volume, pao_vol.nii.gz, may be loaded into 3D Slicer and visualized to verify the fragment creation and relocation (shown in the screenshot below).