Augmented marker tracking for peri-acetabular osteotomy surgery

Abstract

We developed and validated a small, easy to use and cost-effective augmented marker-based hybrid navigation system for peri-acetabular osteotomy (PAO) surgery. The hybrid system consists of a tracking unit directly placed on the patient's pelvis, an augmented marker with an integrated inertial measurement unit ('MU) attached to the patient's acetabular fragment and the host computer. The tracking unit sends a live video stream of the marker to the host computer where the marker's pose is estimated. The augmented marker with the 'MU sends its pose estimate to the host computer where we apply sensor fusion to compute the final marker pose estimate. The host computer then tracks the orientation of the acetabular fragment during peri-acetabular osteotomy surgery. Anatomy registration is done using a previously developed registration device. A Kalman filter-based sensor fusion was added to complete the system. A plastic bone study was performed for validation between an optical tracking-based navigation system and our proposed system. Mean absolute difference for inclination and anteversion was 1.63 degrees and 1.55 degrees, respectively. The results show that our system is able to accurately measure the orientation of the acetabular fragment.

Femoroacetabular Impingement Patients With Decreased Femoral Version Have Different Impingement Locations and Intra- and Extraarticular Anterior Subspine FAI on 3D-CT–Based Impingement Simulation: Implications for Hip Arthroscopy

“…In addition, we had no postoperative CT scans of the patients who were treated surgically. Further, simulation of surgical treatments 31,32 of these patients was not possible. This could be a topic for further research.…”

Augmented reality-guided periacetabular osteotomy—proof of concept

“…Furthermore, it is not sufficient for the control of certain osteotomies due to its two-dimensional nature. Therefore, more sophisticated techniques for the navigation of PAO have been suggested and investigated, including optical tracking systems [ 7 – 10 ] and planar marking and tracking with an inertial measurement unit (IMU) combined into a small hybrid navigation system for PAO [ 11 ] as well as patient-specific template guides [ 12 ]. Such techniques, however, require additional expensive operating room equipment and/or more extensive surgical exposures.…”

Enhanced Positioning Algorithm Using a Single Image in an LCD-Camera System by Mesh Elements’ Recalculation and Angle Error Orientation

“…Several similar methods for calculating the position and orientation of a camera in space using a single image have been described and presented [22,25,26]. Nevertheless, pose estimation and marker detection are widely used tasks for many other technological applications such as autonomous robots [27][28][29], unmanned vehicles [30][31][32][33][34][35][36][37], and virtual assistants [38][39][40][41], among others.…”