Woo Peak
Department of Otolaryngology Head and Neck Surgery, Icahn School of Medicine, New York, New York, USA,
Adv Otorhinolaryngol. 2020;85:25-44. doi: 10.1159/000456681. Epub 2020 Nov 9.
Videostroboscopy and high-speed imaging is now an accepted way to evaluate laryngeal function in patients with voice disorders. In patients with neurolaryngological diseases such as tremor, laryngeal spasm, and paralysis, having an objective way to evaluate vocal function is desirable. Using digital imaging and analysis, both the videostroboscopy and the high-speed video can be analyzed to obtain relevant measures of vocal function. From the videostroboscopy, the montage of the glottal cycle derived from steady of vocal vibration can be analyzed by using edge tracking software to obtain the glottal area waveform. The waveform is an indication of the efficiency of the vocal folds in acting as an oscillator and gives direct information as to the open and closed phase, the symmetry of vocal fold vibration and the degree of amplitude contribution from each fold. High-speed video overcomes the deficiencies of stroboscopy by allowing for all voice gestures to be studies. Using digital kymography and analysis of the vibrogram, analysis of the onset of vocal fold oscillation, evaluation of diplophonia, tremor, and voice breaks becomes possible. Furthermore, analysis of the high-speed video kymograph tracing using signal analysis allow the investigator to evaluate the frequency and power relationships of vocal fold vibratory function in the normal and disordered state.
视频频闪喉镜检查和高速成像现已成为评估嗓音障碍患者喉功能的一种公认方法。对于患有神经喉科疾病（如震颤、喉痉挛和麻痹）的患者，需要有一种客观的方法来评估嗓音功能。通过数字成像和分析，可以对视频频闪喉镜检查和高速视频进行分析，以获得嗓音功能的相关测量值。从视频频闪喉镜检查中，可以使用边缘跟踪软件分析由稳定的声带振动得出的声门周期蒙太奇，以获得声门面积波形。该波形表明声带作为振荡器的效率，并直接提供有关开放和闭合阶段、声带振动对称性以及每个声带振幅贡献程度的信息。高速视频通过允许研究所有嗓音手势克服了频闪喉镜检查的不足。使用数字记波法和振动图分析，可以分析声带振动的起始、评估复音、震颤和嗓音中断。此外，使用信号分析对高速视频记波图追踪进行分析，使研究人员能够评估正常和紊乱状态下声带振动功能的频率和功率关系。
