Dual-Mobility Hip Implant Liner Tracker Validation Data

Dual mobility (DM) implants are being increasingly used for total hip arthroplasties due to additional range of motion and joint stability they afford over more traditional implant types. Currently there are no reported methods for monitoring their motions under realistic operating conditions and therefore, it is challenging to predict how they will function under clinically relevant conditions and what failure modes may exist. This repository contains the validation data and required post-processing scripts for a novel inertial tracking system that directly mounts to the mobile liner of DM implants. The tracker was custom built and based on a low-cost, off-the-shelf inertial measurement unit (IMU) and employed a gradient-decent sensor fusion algorithm for amalgamating nine degree-of-freedom IMU readings into three-axis orientation estimates. Additionally, a novel approach to magnetic interference mitigation using a fixed solenoid and magnetic field simulation was evaluated.

双活动度（Dual Mobility, DM）假体因相较于传统假体可提供更优的活动范围与关节稳定性，正日益广泛应用于全髋关节置换术中。目前尚无在真实工况下监测此类假体运动的相关报道，因此难以预测其在临床相关场景中的运行表现，亦无法明确其潜在失效模式。本代码仓库包含一种新型惯性跟踪系统的验证数据与配套后处理脚本，该系统可直接安装于DM假体的活动衬垫之上。该跟踪器为定制开发，基于低成本商用现货惯性测量单元（IMU），采用梯度下降传感器融合算法，可将九自由度IMU的读数融合为三轴姿态估计结果。此外，本研究还评估了一种基于固定螺线管与磁场仿真的新型磁干扰抑制方案。