Panorama imaging for image-to-physical registration of narrow drill holes inside spongy bones
Panorama imaging for image-to-physical registration of narrow drill holes inside spongy bones
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全景成像，用于海绵骨内狭窄钻孔的图像到物理配准
DOI：
10.1117/12.2254417
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Kahrs LA
中科院分区：
文献类型：
--
作者：
Bergmeier J;Fast JF;Ortmaier T;Kahrs LA
基于体积数据的图像-物理配准是一种重要的外科应用方法，其中一侧是计算机断层扫描，另一侧是术中内窥镜图像。在这篇文章中，我们提出了从内窥镜记录生成全景图的方法，用于海绵骨内狭窄钻孔的图像到物理配准。其中一个核心应用是在微创人工耳蜗术中记录乳突内的钻头姿势。除了开发用于配准的图像处理软件外，还对小型化光学系统进行了研究，通过扩展传统的小而硬的杆状透镜内窥镜，实现了一次360°径向成像。反射锥体几何结构用于将径向入射的光线偏转到内窥镜光学元件中。因此，在传统的0°内窥镜前安装了一个锥面镜。此外，还生成了人工骨材料内钻孔表面的全景图像。在钻孔之前，从该人工骨中获取锥束计算机断层扫描数据，并从该数据中生成模拟内窥镜图像。在图像到图像配准方面执行结果视图的定性和定量图像比较。最初的结果表明，将全景光学系统的直径缩小到3毫米是可能的。传统的刚性棒状透镜内窥镜可以扩展以产生合适的全景单次图像数据。使用展开和拼接方法，生成与同一表面的CT图像数据相似的钻孔内表面的图像。对搜索空间的十次扰动进行配准，目标配准误差在入口点为(0：487±0：438)mm，在出口处为(0：957±0：948)mm，角度误差为(1：763±1：536)°。结果表明，该图像数据适用于图像到图像的配准。对不同方向的误差分量的分析表明，图案结构的影响很大，这意味着较高的多样性会导致较小的误差。
Image-to-physical registration based on volumetric data like computed tomography on the one side and intraoperative endoscopic images on the other side is an important method for various surgical applications. In this contribution, we present methods to generate panoramic views from endoscopic recordings for image-to-physical registration of narrow drill holes inside spongy bone. One core application is the registration of drill poses inside the mastoid during minimally invasive cochlear implantations. Besides the development of image processing software for registration, investigations are performed on a miniaturized optical system, achieving 360° radial imaging with one shot by extending a conventional, small, rigid, rod lens endoscope. A reflective cone geometry is used to deflect radially incoming light rays into the endoscope optics. Therefore, a cone mirror is mounted in front of a conventional 0° endoscope. Furthermore, panoramic images of inner drill hole surfaces in artificial bone material are created. Prior to drilling, cone beam computed tomography data is acquired from this artificial bone and simulated endoscopic views are generated from this data. A qualitative and quantitative image comparison of resulting views in terms of image-to-image registration is performed. First results show that downsizing of panoramic optics to a diameter of 3mm is possible. Conventional rigid rod lens endoscopes can be extended to produce suitable panoramic one-shot image data. Using unrolling and stitching methods, images of the inner drill hole surface similar to computed tomography image data of the same surface were created. Registration is performed on ten perturbations of the search space and results in target registration errors of (0:487 ± 0:438)mm at the entry point and (0:957 ± 0:948)mm at the exit as well as an angular error of (1:763 ± 1:536)°. The results show suitability of this image data for image-to-image registration. Analysis of the error components in different directions reveals a strong influence of the pattern structure, meaning higher diversity results into smaller errors.
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DOI：
10.1007/s11548-014-0997-9
发表时间：
2014
影响因子：
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作者：
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期刊：
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2011
期刊：
BiOS
影响因子：
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作者：
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DOI：
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发表时间：
2009-09-01
影响因子：
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