Tissue surface information for intraoperative incision planning and focus adjustment in laser surgery
Tissue surface information for intraoperative incision planning and focus adjustment in laser surgery
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用于激光手术术中切口规划和焦点调整的组织表面信息
DOI：
10.1007/s11548-014-1077-x
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发表时间：
2014
影响因子：
3
通讯作者：
Ortmaier
中科院分区：
文献类型：
--
作者：
Schoob;Kundrat;Kleingrothe;Andreff;Ortmaier
将计算方法引入激光手术是一个新兴的领域。专注于内窥镜激光干预，提出了一种新的方法，以提高术中切口规划和激光聚焦通过获得的组织表面信息stereoscopicvision.Methodstissue表面估计与立体为基础的方法，使用非参数图像变换。随后，通过在组织替代物上烧蚀图案并执行用于精确激光轴估计的主成分分析来获得激光到相机的配准。此外，利用三焦点转移计算虚拟激光视图。基于深度的激光焦点自适应集成到定制的实验激光装置中，以实现最佳的烧蚀形态。组织替代品和离体动物tissue.ResultsLaser-to-camera注册进行实验验证给出了小于0.2 mm的规划和消融之间的误差。因此，激光工作空间可以在实时视图内精确地突出显示，并且可以直接执行切口规划。激光焦点自适应相关的实验表明，消融几何形状可以保持几乎均匀的深度范围内的7.9 mm，而切割质量显着下降时，激光是defocused. ConclusionsA自动激光焦点调整组织表面的立体场景信息的基础上是可行的，并有可能成为一种有效的方法，最佳的消融。激光到摄像头配准有助于前瞻性用户界面和增强现实扩展的高级手术规划。
PurposeIntroducing computational methods to laser surgery are an emerging field. Focusing on endoscopic laser interventions, a novel approach is presented to enhance intraoperative incision planning and laser focusing by means of tissue surface information obtained by stereoscopic vision.MethodsTissue surface is estimated with stereo-based methods using nonparametric image transforms. Subsequently, laser-to-camera registration is obtained by ablating a pattern on tissue substitutes and performing a principle component analysis for precise laser axis estimation. Furthermore, a virtual laser view is computed utilizing trifocal transfer. Depth-based laser focus adaptation is integrated into a custom experimental laser setup in order to achieve optimal ablation morphology. Experimental validation is conducted on tissue substitutes and ex vivo animal tissue.ResultsLaser-to-camera registration gives an error between planning and ablation of less than 0.2 mm. As a result, the laser workspace can accurately be highlighted within the live views and incision planning can directly be performed. Experiments related to laser focus adaptation demonstrate that ablation geometry can be kept almost uniform within a depth range of 7.9 mm, whereas cutting quality significantly decreases when the laser is defocused.ConclusionsAn automatic laser focus adjustment on tissue surfaces based on stereoscopic scene information is feasible and has the potential to become an effective methodology for optimal ablation. Laser-to-camera registration facilitates advanced surgical planning for prospective user interfaces and augmented reality extensions.
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DOI：
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发表时间：
1975
期刊：
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影响因子：
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发表时间：
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影响因子：
2.6
作者：
A. Böttcher;N. Jowett;S. Kucher;R. Reimer;U. Schumacher;R. Knecht;W. Wöllmer;A. Münscher;C. Dalchow
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影响因子：
2.6
作者：
JAKO, GJ
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JAKO, GJ
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DOI：
--
发表时间：
2010
期刊：
影响因子：
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作者：
Takeshi Seki;K. Oka;A. Naganawa;H. Yamashita;Keri Kim;T. Chiba
通讯作者：
T. Chiba