武汉大学测绘学院,湖北 武汉,430079
高长天,硕士,研究方向:大地测量学与测量工程。E‑mail:2023202140036@whu.edu.cn
姚宜斌,博士,教授。现主要从事全球导航卫星系统(GNSS)数据处理、对流层与电离层建模、卫星大地测量学理论与方法及其应用。E‑mail:ybyao@whu.edu.cn
修回:2026-09-03,
纸质出版:2026-10-05
移动端阅览
高长天,姚宜斌,王鑫哲.移动CT运行中的多传感器融合定位方法[J].测绘地理信息,2026,51(5):123-129
GAO Changtian,YAO Yibin,WANG Xinzhe.A Multi-sensor Fusion Positioning Method for Mobile CT in Operation[J].Journal of Geomatics,2026,51(5):123-129
高长天,姚宜斌,王鑫哲.移动CT运行中的多传感器融合定位方法[J].测绘地理信息,2026,51(5):123-129 DOI: 10.14188/j.2095-6045.20260249.
GAO Changtian,YAO Yibin,WANG Xinzhe.A Multi-sensor Fusion Positioning Method for Mobile CT in Operation[J].Journal of Geomatics,2026,51(5):123-129 DOI: 10.14188/j.2095-6045.20260249.
移动计算机断层扫描(computed tomography,CT)近年来在研究和实际应用中不断增多,但针对CT机架在运行过程中的定位问题,相关研究仍然不足。本文提出一种面向移动CT的高精度多传感器融合定位方法。该方法利用ArUco标记的已知边长提供尺度信息,用于单目视觉中的深度恢复,并进一步建立机架与床体之间的坐标变换关系。同时,提出一种静止条件下的视觉-惯性初始化方法,以保证系统能够高效、准确地完成初始化。通过对移动CT运行场景进行充分仿真,并开展系统性实验验证。该方法在深度恢复、初始化和定位精度方面均表现良好,尤其适用于传统单目VIO(visual-inertial odometry)算法因运动激励不足而难以获得可靠结果的场景。
Mobile CT systems have seen increasing adoption in both research and practical applications in recent years; however, research addressing positioning challenges during CT scanner operation remains insufficient. This paper proposes a high-precision multi-sensor fusion positioning method tailored for mobile CT systems. The method utilizes known side lengths annotated with ArUco markers to provide scale information for depth reconstruction in monocular vision, while establishing coordinate transformation relationships between the scanner frame and the patient table. Additionally, a visual-inertial initialization method under stationary conditions is introduced to ensure efficient and accurate system initialization. Comprehensive simulations of mobile CT operation scenarios and systematic experimental validation demonstrate that the proposed method exhibits excellent performance in depth reconstruction, initialization, and positioning accuracy, particularly effective in scenarios where traditional monocular VIO algorithms struggle to produce reliable results due to insufficient motion excitation.
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