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  • Title: High-speed laryngeal imaging compared with videostroboscopy in healthy subjects.
    Author: Kendall KA.
    Journal: Arch Otolaryngol Head Neck Surg; 2009 Mar; 135(3):274-81. PubMed ID: 19289706.
    Abstract:
    OBJECTIVE: To describe normal vocal fold vibratory characteristics recorded with high-speed digital imaging (HSV) of the larynx. DESIGN: Prospective study of healthy subjects who volunteered to undergo laryngeal HSV and videostroboscopy. Image analysis was randomly assigned to 3 blinded raters. SETTING: Community-based clinic with a specialty in laryngology. PARTICIPANTS: Fifty healthy subjects aged 21 to 65 years who were nonsmokers and who had no voice problems, laryngopharyngeal reflux, or reactive airway disease. MAIN OUTCOME MEASURES: The following characteristics of vibration were described: glottal configuration, phase closure, vibratory symmetry, mucosal wave propagation, amplitude of vibration, and periodicity of vibration. Interrater and intrarater reliabilities were calculated for both imaging modalities. RESULTS: The range of findings for each measure is described. The comparison of videostroboscopy ratings with ratings from HSV studies did not reveal any significant difference between the 2 modalities for any of the measures except for the assessment of periodicity. Aperiodic vibratory characteristics were noted on 30% of the videostroboscopy studies (n = 15) and in only 4% of the HSV studies (n = 2) (P <. 001). Although interrater and intrarater agreement were considered to be generally acceptable, a significant rater effect was identified. CONCLUSION: This preliminary study describes a range of normal values for vocal fold vibratory characteristics as recorded with laryngeal HSV, providing a basis for comparison of studies in patients with voice problems.
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