口腔颌面部混合现实动态追踪技术数字化模型的应用基础研究

Application of digital model of mixed reality dynamic tracking technique in oral and maxillofacial surgery: a basic research

目的探讨混合现实技术在口腔颌面外科中的应用价值,开展体外模型混合现实动态追踪技术基础研究。方法通过采集患者术前增强CT数据,重建三维数字化模型,结合3D打印技术,在体外模型上对病变动态追踪,然后对比不同配准方式的效率。结果通过术前增强CT数据的三维重建及多解剖模型组合获得了三维可视化的头颈部模型,并完成体外动态追踪,其中面部标志识别法追踪过程中,半侧位动态追踪平均时间(T45°)为3.67帧,侧位动态追踪平均时间(T90°)为10.67帧,全程动态追踪平均时间(T总)为12秒28帧(30帧/秒);QR码识别法追踪过程中,T45°为1.67帧,T90°为2.33帧,T总为11秒13帧(30帧/秒)。结论MR技术与3D打印技术相结合可实现体外模型病变动态追踪,为临床运用MR技术实施精准个性化手术方案打下基础。

Objective This paper aims to explore the application value of mixed reality in oral and maxillofacial surgery and to conduct dynamic tracking using an in vitro model.Methods By collecting preoperative enhanced CT data of patients,rebuilding 3D digital model,combined with 3D printing technology,dynamic tracking of lesions was realized in the in vitro model,and the efficiency of different registration methods was compared.Results The 3D visualized head and neck model was obtained by combining multiple anatomical models,and dynamic tracking was completed in vitro.The average tracking time of the facial mark recognition method was T45°=3.67 frames,T90°=10.67 frames,and T total=12 seconds 28 frames(30 frames per second).The average tracking time of QR code recognition method was T45°=1.67 frames,T90°=2.33 frames,and T total=11 seconds 13 frames(30 frames per second).Conclusion The combination of MR technology and 3D printing technology can realize the dynamic tracking of lesions in vitro,which lays a foundation for the clinical application of MR technology to implement precise,personalized surgical programs.