Videokymography

Videokymography (VKG) is a medical imaging technique used primarily in the field of laryngology to visualize and analyze the vibratory characteristics of the vocal folds. This technique provides a high-speed, line-scan imaging of the vocal fold vibration, allowing for detailed examination of the vibratory patterns.

History

Videokymography was first introduced in the 1990s as a tool for visualizing the vibratory patterns of the vocal folds. The technique was developed as a response to the need for a more detailed and dynamic imaging method than what was available at the time.

Technique

Videokymography utilizes a high-speed camera to capture line-scan images of the vocal folds during phonation. The camera is typically positioned at the level of the glottis, and the images are captured at a rate of several thousand frames per second. The resulting images provide a detailed view of the vibratory patterns of the vocal folds, including the opening and closing phases, the amplitude of the vibration, and the symmetry of the vibration between the two folds.

Applications

Videokymography is primarily used in the diagnosis and treatment of voice disorders. By providing a detailed view of the vibratory patterns of the vocal folds, VKG can help identify abnormalities such as vocal fold paralysis, vocal fold nodules, and vocal fold polyps. In addition, VKG can be used to monitor the progress of treatment and to guide surgical interventions.

Advantages and Limitations

One of the main advantages of videokymography is its ability to provide a detailed view of the vibratory patterns of the vocal folds. This can be particularly useful in cases where other imaging techniques, such as stroboscopy, are unable to provide sufficient detail. However, VKG also has some limitations. For example, it only provides a two-dimensional view of the vocal folds, and it requires a high level of expertise to interpret the images correctly.

See Also

• Laryngology
• Vocal fold
• Voice disorders