Monike Tsutsumi1, Seiji Isotani2, Regina Aparecida Pimenta3, Maria Eugenia Dajer4, Adriana Hachiya5, Domingos Hiroshi Tsuji5, Niro Tayama6, Hisayuki Yokonishi7, Hiroshi Imagawa8, Akihito Yamauchi8, Shingo Takano6, Ken-Ichi Sakakibara9, Arlindo Neto Montagnoli10. 1. Interunits Graduate Program in Bioengineering, University of Sao Paulo, Sao Carlos, Sao Paulo, Brazil. Electronic address: moniketsutsumi@usp.br. 2. Institute of Mathematics and Computer Science, University of Sao Paulo, Sao Carlos, Sao Paulo, Brazil. 3. Interunits Graduate Program in Bioengineering, University of Sao Paulo, Sao Carlos, Sao Paulo, Brazil. 4. Department of Electrical Engineering, Federal University of Technology of Parana, Cornelio Procopio, Parana, Brazil. 5. Department of Otorhynolaryngology, Sao Paulo University School of Medicine, University of Sao Paulo, Sao Paulo, Sao Paulo, Brazil. 6. Department of Otolaryngology and Tracheo-esophagology, The National Center for Global Health and Medicine, Tokyo, Japan. 7. Department of Otolaryngology, The Tokyo Metropolitan Police Hospital, Tokyo, Japan. 8. Department of Otolaryngology, The University of Tokyo Hospital, Tokyo, Japan. 9. Department of Communication Disorders, The Health Sciences University of Hokkaido, Ishikari-gun, Hokkaido, Japan. 10. Department of Electrical Engineering, Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil.
Abstract
OBJECTIVES: We conducted a study to obtain quantitative parameters of the vocal dynamic using high-speed videolaryngoscopy and to characterize the vocal fold vibration pattern of healthy individuals by analyzing glottal area waveforms and high-speed kymography. METHODS: Laryngeal images of 45 healthy individuals were captured using high-speed videolaryngoscopy. The open and speed quotients of the glottal area waveforms and high-speed kymography were obtained and statistically analyzed according to the gender of each individual. RESULTS: Glottal area waveforms revealed average values of 0.85 and 1.16 for open and speed quotients, respectively, for women, and 0.70 and 1.19 for men. Using high-speed kymography, quantitative parameters of open and speed quotients for women were 0.62 and 1.02, respectively, and for men were 0.57 and 1.12. By gender, a significant statistical difference emerged for open quotients obtained from both glottal area waveforms (P = 0.004) and high-speed kymography (P = 0.013). CONCLUSION: Obtained by using computational tools specifically for analyzing laryngeal images from high-speed videolaryngoscopy, quantitative parameters of glottal area waveforms and high-speed kymography in healthy individuals provide reference data and normality for future studies.
OBJECTIVES: We conducted a study to obtain quantitative parameters of the vocal dynamic using high-speed videolaryngoscopy and to characterize the vocal fold vibration pattern of healthy individuals by analyzing glottal area waveforms and high-speed kymography. METHODS: Laryngeal images of 45 healthy individuals were captured using high-speed videolaryngoscopy. The open and speed quotients of the glottal area waveforms and high-speed kymography were obtained and statistically analyzed according to the gender of each individual. RESULTS: Glottal area waveforms revealed average values of 0.85 and 1.16 for open and speed quotients, respectively, for women, and 0.70 and 1.19 for men. Using high-speed kymography, quantitative parameters of open and speed quotients for women were 0.62 and 1.02, respectively, and for men were 0.57 and 1.12. By gender, a significant statistical difference emerged for open quotients obtained from both glottal area waveforms (P = 0.004) and high-speed kymography (P = 0.013). CONCLUSION: Obtained by using computational tools specifically for analyzing laryngeal images from high-speed videolaryngoscopy, quantitative parameters of glottal area waveforms and high-speed kymography in healthy individuals provide reference data and normality for future studies.
Authors: Veronika Birk; Stefan Kniesburges; Marion Semmler; David A Berry; Christopher Bohr; Michael Döllinger; Anne Schützenberger Journal: J Acoust Soc Am Date: 2017-10 Impact factor: 1.840