立体可视化与六自由度交互作用在全髋关节置换术术前规划中的作用。

Debora Testi, Riccardo Lattanzi, Marco Benvegnù, Marco Petrone, Cinzia Zannoni, Marco Viceconti, Aldo Toni
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引用次数: 5

摘要

本研究的目的是评估虚拟现实(VR)环境下全髋关节置换术前计划中六自由度应用的准确性。对系统的固有精度进行了测试。用户可以在虚拟现实环境中移动物体,其内在精度几乎比物体尺寸高四个数量级。定义了第二个明确且相关的任务,以评估在特定规划任务中使用接口可实现的准确性。结果与二维界面的结果进行了比较。假设均方根误差是可实现精度的指标。该沉浸式界面的精度可与标准的鼠标-显示器界面相媲美。用户一致使用VR界面,证实了新界面的高可用性和不熟悉新环境的用户的陡峭学习曲线。本研究表明,将VR环境应用于全髋关节置换术前计划可能有助于缩短定位时间,并且即使是首次使用者也能获得一致的结果。
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Efficacy of stereoscopic visualization and six degrees of freedom interaction in preoperative planning of total hip replacement.

The aim of this study was to assess the accuracy of a six-degrees-of-freedom application for pre-operative planning of total hip replacement in a virtual reality (VR) environment. A test was performed estimating the system inherent accuracy. The users can move objects in the VR environment with an intrinsic accuracy almost four orders of magnitude greater than the object dimension. A second unambiguous and relevant task was defined to assess the accuracy achievable with the interface in a specific planning task. The results were compared with those obtained with 2D interfaces for both the stem and the cup component. The RMSE was assumed as an indicator of the achievable accuracy. The accuracy of the immersive interface was comparable with that achievable with a standard mouse - monitor interface. The users were consistent using the VR interface, confirming the high usability of the new interface and the steep learning curve of users unfamiliar with the new environment. This study has demonstrated that the application of VR environment for pre-operative planning of total hip replacement may help to shorten the duration of the positioning and to yield consistent results even with first-time users.

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