Laser-Calibrated System for Transnasal Fiberoptic Laryngeal High-Speed Videoendoscopy
Laser-Calibrated System for Transnasal Fiberoptic Laryngeal High-Speed Videoendoscopy
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DOI：
10.1016/j.jvoice.2019.07.013
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发表时间：
2021-01-13
期刊：
影响因子：
2.2
通讯作者：
Hillman, Robert E.
中科院分区：
文献类型：
--
作者：
Deliyski, Dimitar D.;Shishkov, Milen;Hillman, Robert E.
本文介绍了一种新研制的激光投射经鼻软式内窥镜与高速电视内窥镜系统的设计指标和实验特性。所提出的系统的硬件和软件设计受益于结构化绿色投影和激光三角测量技术的组合，其提供了在发声期间沿着水平和垂直平面的喉部结构的校准绝对测量的能力。对体内采集图像的目视检查表明激光点与背景之间存在鲜明对比，证实了系统设计成功。进行了客观分析，以评估系统的辐照度和绿色激光进入记录图像中的红色和蓝色通道的穿透。分析表明，该系统在20 mm工作距离处的辐照度为372 W/m（2），完全在安全限值范围内，表明该器械用于人类受试者的风险极小。此外，颜色渗透分析表明，在90%的概率下，红色通道被绿色激光污染的比率小于0.002。这表明激光投影对在红色数据通道上执行的测量的影响最小，使得该系统适用于校准的3D时空分割和数据驱动的特定对象建模，这对于进一步推进语音科学和临床语音评估是重要的。
The design specifications and experimental characteristics of a newly developed laser-projection transnasal flexible endoscope coupled with a high-speed videoendoscopy system are provided. The hardware and software design of the proposed system benefits from the combination of structured green light projection and laser triangulation techniques, which provide the capability of calibrated absolute measurements of the laryngeal structures along the horizontal and vertical planes during phonation. Visual inspection of in vivo acquired images demonstrated sharp contrast between laser points and background, confirming successful design of the system. Objective analyses were carried out for assessing the irradiance of the system and the penetration of the green laser light into the red and blue channels in the recorded images. The analysis showed that the system has irradiance of 372 W/m(2) at a working distance of 20 mm, which is well within the safety limits, indicating minimal risk of usage of the device on human subjects. Additionally, the color penetration analysis showed that, with probability of 90%, the ratio of contamination of the red channel from the green laser light is less than 0.002. This indicates minimal effect of the laser projection on the measurements performed on the red data channel, making the system applicable for calibrated 3D spatial-temporal segmentation and data-driven subject-specific modeling, which is important for further advancing voice science and clinical voice assessment.