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2D增强现实是否足够精确用于中耳内镜手术?

Ali Taleb1, Caroline Guigou2,3, Alain Lalande2,4

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在外科手术中,增强现实 (AR) 提高了精度. 薄透镜模型为耳部手术中的AR系统提供了比传统的针孔模型更准确的错误估计.

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从3D转换为2D增强现实是一种增强现实.耳部外科手术 耳部外科手术图像的注册 图像的注册反投影错误是一个错误.薄镜头镜头是一种薄镜头.

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科学领域:

  • 医疗成像医学成像
  • 手术技术 手术技术
  • 计算机辅助手术 计算机辅助手术

背景情况:

  • 增强现实 (AR) 通过将手术前的3D成像叠加到实时手术视频上来提高手术精度.
  • 准确的错误估计对于AR系统性能评估至关重要.
  • 传统的再投射误差估计使用针孔摄像机模型,这对于内镜和显微镜来说是不准确的.

研究的目的:

  • 评估AR系统,用于将CT扫描记录到用于耳部手术的2D耳内镜视频.
  • 为了在这个AR系统中比较针孔摄像机模型与薄镜头模型的准确性,用于错误估计.
  • 分析影响目标注册再投射错误的因素.

主要方法:

  • 对AR耳部手术进行CT扫描到2D耳内镜视频记录的系统进行了评估.
  • 使用五个带有球形标记器和CT扫描的人类耳朵树脂模型测量了目标注册再投射误差.
  • 对于错误估计,对针孔和薄镜头摄像机模型进行了比较.

主要成果:

  • 薄透镜模型的估计误差为0.65 ± 0.52毫米,而针孔模型的估计误差为0.79 ± 0.60毫米 (18%的差异).
  • 目标注册再投影错误显示了与目标与相机镜头距离的相关性.
  • 目标镜头距离和对齐都显著影响了误差测量.

结论:

  • 与针孔模型相比,薄透镜模型为内镜AR应用提供了更准确的错误估计.
  • 目标镜头距离和对齐是影响再投射误差的关键参数.
  • 评估的AR系统适用于耳部外科手术应用.