Photoglottography

Photoglottography

Voice assessment in the out-patient department

Published in Declan Costello, Guri Sandhu, Practical Laryngology, 2015

Some clinicians prefer electroglottography (EGG) to sound source signal processing because it avoids the upper airway’s modulation of the source waveform. However, surface electrodes are not without problems, particularly interference from electrical noise.39 In photoglottography (PGG), a light is shone through the glottis whose intensity relates to the open area of the vocal fold.46 Combined EGG and PGG might provide maximum information, but this technique has not been adopted in clinical practice.

Objective measurement of mucosal wave parameters in diagnosing benign lesions of the vocal folds

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Journal Information

Published in Logopedics Phoniatrics Vocology, 2019

Paulina Krasnodębska, Agata Szkiełkowska, Beata Miaśkiewicz, Elżbieta Włodarczyk, Anna Domeracka-Kołodziej, Henryk Skarżyński

OQVSK decreased from posterior to anterior in the control group. This tendency was also observed by Lohscheller et al. (11) using high-speed videolaryngoscopy. Parameters acquired via EGG or VSK are not equivalent. Both methods approximately describe the open phase of the glottal cycle, and in this research we saw similarities in values of these parameters. Hacki has described a correlation between OQ measured from EGG, photoglottography and laryngostroboscopy (12). In later work, he used QOQEGG to diagnose functional dysphony (13). No data were found in the literature regarding the use of QOQEGG to assess benign lesions of the vocal folds or a combination of VSK and EGG.

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Voice assessment in the out-patient department

Objective measurement of mucosal wave parameters in diagnosing benign lesions of the vocal folds