一个改进的摄像机模型用于斜视腹腔镜:高反射精度,独立于望远镜旋转
Roeland Eppenga1, Gerard Snaauw1, Koert Kuhlmann1
1Department of Surgical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
Physics in medicine and biology
|August 15, 2023
概括
一种新的摄像机模型在手术期间准确地跟踪斜视腹腔镜,无论望远镜的旋转如何. 这项创新增强了图像引导干预的增强现实 (AR),提高了手术精度.
科学领域:
- 医疗成像医学成像
- 手术技术 手术技术
- 计算机视觉 计算机视觉
背景情况:
- 在腹腔镜手术中,斜视腹腔镜对于狭窄的解剖区域至关重要.
- 望远镜的旋转会改变相机参数,影响增强现实 (AR) 模型的再投影精度.
- 精确的摄像头校准对于可靠的AR在图像引导干预中至关重要.
研究的目的:
- 开发一种可适应的摄像机模型,用于斜视腹腔镜.
- 为了在广泛的望远镜旋转角度中实现高反射精度.
- 为了增强图像引导腹腔镜手术中的AR应用.
主要方法:
- 通过对望远镜广泛旋转 (320°) 的校准来获得相机参数.
- 开发了用于定期更改相机参数的插值模型.
- 通过重新投射棋盘角点并计算根-平均-正方形再投影错误 (RMSEs) 来验证模型.
主要成果:
- 实现低RMSEs (传统的2.8±0.7像素,COTT腹腔镜的3.6±0.7像素) 独立于旋转角度.
- 世界坐标误差是最小的 (分别为0.3±0.1毫米和0.4±0.1毫米).
- 对于两种腹腔镜类型,最坏情况下的误差仍然低于9像素 (0.8毫米).
结论:
- 这种新型摄像机模型显著提高了斜视腹腔镜的再投影精度.
- 该模型在不同的望远镜旋转角度中具有稳定性,适用于各种腹腔镜类型.
- 这一进步对于精确的AR在使用灵活腹腔镜的图像引导干预中至关重要.
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