function exportHumeralHeadSphere(obj)
  exportFilename = fullfile(...
    obj.shoulder.SCase.dataSlicerPath,...
    "HH_fitted_sphere_" + obj.shoulder.side + ".ply");

  humeralHead = Sphere();
  humeralHead.fitTo(obj.landmarks);
  humeralHead.exportPly(exportFilename);
end