Videokymography: research and clinical issues

Abstract

Log Phon Vocol 1997; 22: 152-156Stroboscopy is based on the assumption that the vibration is stable and regular. Irregular vibrations, as is often the case in voice pathology, cannot easily be studied by stroboscopy. Videokymography overcomes this drawback. Videokymography, using a modified CCD video camera, makes it possible to observe all kinds of regular and irregular vocal fold vibrations, including those leading to pathological voice productions, It easily visualises small left-right asymmetries, open and closed phases of the selected part of the glottis, lateral propagation of mucosal waves, movements of the upper margin and, in the closing phase, the lower margin of the vocal folds. This is advantageous for a more accurate diagnosis of voice disorders. Also other fields which study mechanical vibrations, like strings of musical instruments, may benefit from videokymography.

An Automatic Method to Quantify the Vibration Properties of Human Vocal Folds via Videokymography

“…In the standard mode, the camera functions as a normal video camera; in the highspeed mode, the camera only captures the first line of the CCD matrix with a rate of 7,812.5 lines per second, and then the consecutive line images are put below each other to form a videokymographic (VKG) image. Therefore, videokymography is a powerful and cost-friendly method to observe the variability of vocal fold vibration [2,3].…”

Upper Displacement of the Anterior Commissure: Experimental Study of a New Phonosurgical Approach to Raising Vocal Pitch

“…28 As a result, the anterior and posterior portions of the vocal folds cannot be assessed simultaneously. [29][30][31] Using videokymography, we concluded that UDAC significantly reduced the VC, oP, cP, OP, and CP durations. Despite the fact that UDAC reduced the duration of all time phases, no significant differences in OQ or SQ were observed between the preoperative time point and the post-UDAC time point.…”

Avances tecnológicos recientes en el diagnóstico y tratamiento de las enfermedades de la laringe y el tracto aerodigestivo superior

“…En ese entonces era necesario obtener las películas, revelarlas y reproducirlas, lo que lo hacía un método poco práctico y no permitió su uso rutinario. Los avances tecnológicos en el campo del video de alta velocidad han permitido la obtención de las imágenes y su reproducción inmediata, lo que ha cambiado las perspectivas y facilitado el entendimiento de los eventos que tienen lugar en el borde libre de los pliegues vocales durante el ciclo vibratorio (13,14).…”