Annu Int Conf IEEE Eng Med Biol Soc. 2022 Jul;2022:3481-3484. doi: 10.1109/EMBC48229.2022.9871766.
Patient-specific templates (PST) have become a useful tool for guiding osteotomy in complex surgical scenarios such as pelvic resections. The design of the surgical template results in sharper, less jagged resection margins than freehand cuts. However, their correct placement can become difficult in some anatomical regions and cannot be verified during surgery. Conventionally, pelvic resections are performed using Computer Assisted Surgery (CAS), and in recent years Augmented Reality (AR) has been proposed in the literature as an additional tool to support PST placement. This work presents an AR task to simplify and improve the accuracy of the positioning of the template by displaying virtual content. The focus of the work is the creation of the virtual guides displayed during the AR task. The system was validated on a patient-specific phantom designed to provide a realistic setup. Encouraging results have been achieved. The use of the AR simplifies the surgical task and optimizes the correct positioning of the cutting template: an average error of 2.19 mm has been obtained, lower than obtained with state-of-the-art solutions. In addition, supporting PST placement through AR guidance is less time-consuming than the standard procedure that solely relies on anatomical landmarks as reference.
个体化模板（PST）已成为指导复杂手术场景（如骨盆切除）中截骨术的有用工具。与徒手切割相比，手术模板的设计可使切除边缘更锋利，锯齿状更小。然而，在某些解剖区域，它们的正确放置可能会变得困难，并且在手术过程中无法进行验证。传统上，骨盆切除术是使用计算机辅助手术（CAS）进行的，近年来，增强现实（AR）技术已在文献中被提出作为支持 PST 放置的附加工具。本工作提出了一种 AR 任务，通过显示虚拟内容来简化和提高模板定位的准确性。工作的重点是创建在 AR 任务中显示的虚拟指南。该系统在专门设计用于提供逼真设置的患者特异性模型上进行了验证。已取得令人鼓舞的结果。使用 AR 简化了手术任务并优化了切割模板的正确定位：已获得平均误差为 2.19 毫米，低于最先进解决方案的结果。此外，通过 AR 引导支持 PST 放置比仅依赖解剖标志作为参考的标准程序耗时更少。
