Department of Neurosurgery, Radboud University Medical Centre, Nijmegen, The Netherlands.
Faculty of Electrical Engineering, Mathematics and Computer Science, University of Twente, Enschede, The Netherlands.
Sci Rep. 2018 Feb 20;8(1):3349. doi: 10.1038/s41598-018-21662-w.
Virtual planning of open cranial vault reconstruction is used to simulate and define an pre-operative plan for craniosynostosis surgery. However, virtual planning techniques are subjective and dependent on the experience and preferences of the surgical team. To develop an objective automated 3D pre-operative planning technique for open cranial vault reconstructions, we used curvature maps for the shape comparison of the patient's skull with an age-specific reference skull. We created an average skull for the age-group of 11-14 months. Also, we created an artificial test object and selected a cranial CT-scan of an 11 months old trigonocephaly patient as test case. Mesh data of skulls were created using marching cubes and raycasting. Curvature maps were computed using quadric surface fitting. The shape comparison was tested for the test object and the average skull. Finally, shape comparison was performed for the trigonocephalic skull with the average skull. Similar shapes and the area on the patient's skull that maximally corresponded in shape with the reference shape were correctly identified. This study showed that curvature maps allow the comparison of craniosynostosis skulls with age-appropriate average skulls and a first step towards an objective user-independent pre-operative planning technique for open cranial vault reconstructions is made.
开颅颅顶重建的虚拟规划用于模拟和定义颅缝早闭手术的术前计划。然而，虚拟规划技术具有主观性，并且取决于手术团队的经验和偏好。为了开发用于开颅颅顶重建的客观自动 3D 术前规划技术，我们使用曲率图比较患者颅骨的形状与特定年龄的参考颅骨。我们为 11-14 个月龄组创建了一个平均颅骨。此外，我们还创建了一个人工测试对象，并选择了一个 11 个月大的三角头畸形患者的颅 CT 扫描作为测试案例。使用行进立方体和光线投射创建颅骨的网格数据。使用二次曲面拟合计算曲率图。对测试对象和平均颅骨进行形状比较测试。最后，对三角头畸形颅骨与平均颅骨进行形状比较。相似的形状和与参考形状最大程度对应的患者颅骨区域被正确识别。这项研究表明，曲率图允许将颅缝早闭颅骨与年龄匹配的平均颅骨进行比较，并朝着用于开颅颅顶重建的客观、用户独立的术前规划技术迈出了第一步。
