Photoglottography: A Clinical Synopsis
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چکیده
Although photoglottography (PGG) has been used as a measure proportional to glottal area, it has not been widely applied in the clinic to study dysphonic patient populations. Historically, PGG has required the insertion of either a light source or photosensor at least to the level of the oropharynx or nasopharynx. This invasive nature of PGG has probably limited its appeal to those who are unwilling to risk injury or discomfort to subjects. Additionally, the effort and time necessary to carefully hand-mark glottal events for analysis has limited its clinical use. This report presents a brief overview of PGG and describes two techniques to help enhance its clinical application: a minimally invasive transoral technique of illumination and an automated technique to identify glottal events. In addition, two possible factors that may confound the interpretation of transoral PGG results were evaluated: the effects of transoral versus transnasal light sources, and effects of change in articulatory configuration on PGG results .
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