在各种胃肠道模拟模型中使用TDoA对基于UWB的无线囊内镜的位置估计
Sruthi Krishnan1, Mohammed Abdel-Hafez1, Matti Hämäläinen2
1Department of Electrical and Communication Engineering, College of Engineering, United Arab Emirates University, Al-Ain, United Arab Emirates.
PloS one
|March 6, 2025
概括
这项研究提高了无线囊内镜 (WCE) 位置精度,使用超宽带 (UWB) 和Chan算法与到达时间差异 (TDoA). 优化接收器放置可以显著减少WCE定位错误.
科学领域:
- 医疗成像医学成像
- 生物医学工程 生物医学工程
- 无线通信无线通信
背景情况:
- 无线囊内镜 (WCE) 对于诊断胃肠道疾病至关重要.
- 精确地定位WCE对于有效的治疗计划至关重要.
- 超宽带 (UWB) 技术为WCE定位提供了有希望的进步.
研究的目的:
- 为了研究使用到达时间差异 (TDoA) 进行WCE本地化,查恩算法的有效性.
- 分析接收器配置和腹部组织变异对定位精度的影响.
- 为了减少WCE位置估计中的根平均平方误差 (RMSE).
主要方法:
- 使用Chan算法与TDoA用于WCE定位.
- 在电磁模拟环境中使用人类声素模型进行了UWB传播实验.
- 从模拟的腹部组织厚度获得的应用距离错误到Chan算法.
- 评估了不同数量的接收器的性能,并将结果与克拉梅尔-拉奥下限 (CRLB) 进行了比较.
主要成果:
- 将接收器放置在三行内,可以减少44%的估计误差;中间的参考接收器可以减少33%的估计误差.
- 增加接收器从9到33降低了RMSE从大约4毫米到1毫米.
- 采用TDoA的Chan算法在WCE本地化方面表现出更高的准确性,特别是在优化的接收器位置方面.
结论:
- 基于TDoA的Chan算法,增强了UWB和优化的接收器配置,显著提高了WCE本地化准确性.
- 这种方法有可能开发出更精确,更可靠的未来式内镜囊.
- 考虑到腹部组织的变化,进一步完善了定位准确性,这对于临床应用至关重要.
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