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无线囊内镜的UWB路径基于损失的定位的准确性

Umma Hany¹, Lutfa Akter²

¹Department of Electrical and Electronic Engineering, Ahsanullah University of Science and Technology, Dhaka, Bangladesh.

Journal of healthcare engineering

|June 22, 2023

概括

这项研究引入了一种新的方法,可以使用超宽带信号在胃肠道内精确定位无线囊内镜 (WCE) 设备. 新的平滑路径损失程度为基础的加权心脏位点定位 (SPLD-WCL) 算法实现了高精度的病变诊断.

科学领域:

医疗成像医学成像
生物医学工程生物医学工程
信号处理信号处理

背景情况:

无线囊内镜 (WCE) 对于诊断胃肠道病变至关重要.
精确地定位WCE对于精确的病变识别至关重要.
当前的本地化方法在复杂的环境中可能缺乏足够的准确性.

研究的目的:

为WCE提出和评估一个基于超宽带 (UWB) 路径损失的本地化算法.
使用克莱默-拉奥下限 (CRLB) 估计精度极限.
开发一种强大的局部化方法,最大限度地减少组织影像偏差.

主要方法:

开发了一种方法,通过减轻阴影色效应来估计光滑路径损失.
利用估计的路径损失来确定路径损失程度和传感器位置权重.
提出了基于平滑路径损失度的加权中心点定位 (SPLD-WCL) 算法.

主要成果:

模拟了SPLD-WCL算法,以评估其本地化性能.
与计算的CRLB相比,验证了本地化准确性.
实现了6.83毫米的根平均平方误差 (RMSE),证明了高精度.

结论:

该SPLD-WCL算法提供精确的WCE定位在小肠.
该方法有效地处理由身体组织引起的路径损失变化.
这种技术为改善胃肠道诊断提供了一个有前途的解决方案,而不需要先前的参数知识.

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