研究目的
To evaluate a prototype optical tracking system for computer-assisted orthopedic surgery, focusing on its reliability and accuracy in tracking surgical instruments without markers, specifically for hip surgery applications.
研究成果
The prototype optical tracking system achieves accuracy comparable to conventional systems in clinical settings for hip surgery, with errors generally within acceptable limits (less than 5 degrees). However, performance is distance-dependent, and improvements could be made with higher-resolution sensors. The system offers advantages in compactness and ease of use but requires further development to eliminate the need for marker arrays and enhance reliability.
研究不足
The system still requires a bone-mounted marker array for reference, and accuracy degrades with distance due to lower point density from the ToF camera. The use of 3D-printed replicas instead of real instruments may not fully replicate clinical conditions. The prototype's reliance on specific hardware (e.g., smartphone and ToF camera) limits its generalizability.
1：Experimental Design and Method Selection:
The evaluation involved accuracy tests and tracking reliability assessments using a prototype system with a smartphone and a time-of-flight camera. The system uses algorithms for background subtraction and 3D matching to track instruments.
2：Sample Selection and Data Sources:
Experiments were conducted with 3D-printed replicas of surgical instruments (reamer and impactor) used in hip surgery, mounted on a motorized platform. Data were acquired at different distances (
3：00 m, 15 m, 30 m). List of Experimental Equipment and Materials:
Equipment included a smartphone (LG Nexus 5), a time-of-flight camera (PMD CamBoard pico flexx), a motorized platform, and a reference optical tracking system (Polaris Spectra). Materials included 3D-printed instrument replicas and reflective marker arrays.
4：Experimental Procedures and Operational Workflow:
The instruments were mounted on the platform, and orientation was changed in steps. Measurements were triggered manually, with data processed to compute orientation angles. The reference system provided ground truth data.
5：Data Analysis Methods:
Angular errors (inclination, anteversion, total error) and success rates were calculated using statistical methods, comparing results from the prototype and reference systems.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
