Quantitative Analysis of Vocal Fold Vibration in Vocal Fold Paralysis With the Use of High-speed Digital Imaging

Yamauchi, Akihito; Yokonishi, Hisayuki; Imagawa, Hiroshi; Sakakibara, Ken-Ichi; Nito, Takaharu; Tayama, Niro

doi:10.1016/j.jvoice.2015.10.015

Cited by 14 publications

(9 citation statements)

References 45 publications

(91 reference statements)

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“…This suggests that the combination of disordered oscillations (Group S or Group A ) and GGI 3 is particularly unfavorable with respect to the oscillatory characteristics of the vocal folds. The two GAW parameters ASI and PAI, which reflect the dynamic left-right symmetry of the vocal folds, are associated with voice pathologies [58,64]. Surprisingly in this study, as well as in Döllinger et al [39] the ASI and PAI values had better values for GGI 2 compared to GGI 1 and GGI 3 .…”

Section: Gaw Parameterscontrasting

confidence: 49%

“…The PAI values were statistically significantly worse for the aperiodic vibrations (p = 0.009). This may be an indication that aperiodic oscillations are related to voice pathologies [58,64]. The ASQ values drop for GGI 1,2 from 0.60 to 0.49 and then increases to 0.52 for GGI 2,3 .…”

Section: Gaw Parametersmentioning

confidence: 94%

“…In comparison with the mean values of Döllinger et al [39], it is noticeable that the fundamental frequency f 0 shows higher mean values (+8%) as do the minimum (+9%) and maximum values (+4%); see Table 2. This may be an indication for pathological voice, since Yamauchi et al [58] found a relationship between incomplete glottis closure and an increase of the fundamental frequency, while investigating data of patients with vocal fold paralysis. Also, similar findings were reported by Wolfe et al [59] who found a correlation between jitter and the degree of dysphonia by considering the mean fundamental frequency.…”

Section: Fundamental Phonatory Parametersmentioning

confidence: 99%

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Impact of Subharmonic and Aperiodic Laryngeal Dynamics on the Phonatory Process Analyzed in Ex Vivo Rabbit Models

et al. 2019

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Normal voice is characterized by periodic oscillations of the vocal folds. On the other hand, disordered voice dynamics (e.g., subharmonic and aperiodic oscillations) are often associated with voice pathologies and dysphonia. Unfortunately, not all investigations may be conducted on human subjects; hence animal laryngeal studies have been performed for many years to better understand human phonation. The rabbit larynx has been shown to be a potential model of the human larynx. Despite this fact, only a few studies regarding the phonatory parameters of rabbit larynges have been performed. Further, to the best of our knowledge, no ex vivo study has systematically investigated phonatory parameters from high-speed, audio and subglottal pressure data with irregular oscillations. To remedy this, the present study analyzes experiments with sustained phonation in 11 ex vivo rabbit larynges for 51 conditions of disordered vocal fold dynamics. (1) The results of this study support previous findings on non-disordered data, that the stronger the glottal closure insufficiency is during phonation, the worse the phonatory characteristics are; (2) aperiodic oscillations showed worse phonatory results than subharmonic oscillations; (3) in the presence of both types of irregular vibrations, the voice quality (i.e., cepstral peak prominence) of the audio and subglottal signal greatly deteriorated compared to normal/periodic vibrations. In summary, our results suggest that the presence of both types of irregular vibration have a major impact on voice quality and should be considered along with glottal closure measures in medical diagnosis and treatment.

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Section: Gaw Parameterscontrasting

confidence: 49%

Section: Gaw Parametersmentioning

confidence: 94%

Section: Fundamental Phonatory Parametersmentioning

confidence: 99%

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Impact of Subharmonic and Aperiodic Laryngeal Dynamics on the Phonatory Process Analyzed in Ex Vivo Rabbit Models

et al. 2019

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“…Despite statistically significant differences, but due to the actual low range of the glottal asymmetry parameters ASI and PAI as compared to the rather high variation in acoustic parameters (Table IV), we encourage further studies to analyze the dependencies between dynamic vocal fold asymmetries and voice quality since this topic is still under discussion (Mehta et al, 2011). Nevertheless, dynamic asymmetry is often reported for voice disorders (Yamauchi et al, 2016;Samlan and Story, 2017).…”

Section: Phonatory Correlations and Parameter Dependenciesmentioning

confidence: 92%

Investigation of phonatory characteristics using ex vivo rabbit larynges

Döllinger

Kniesburges

Berry

et al. 2018

The Journal of the Acoustical Society of America

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Quantitative analysis of phonatory characteristics of rabbits has been widely neglected. However, preliminary studies established the rabbit larynx as a potential model of human phonation. This study reports quantitative data on phonation using ex vivo rabbit larynx models to achieve more insight into dependencies of three main components of the phonation process, including airflow, vocal fold dynamics, and the acoustic output. Sustained phonation was induced in 11 ex vivo rabbit larynges. For 414 phonatory conditions, vocal fold vibrations, acoustic, and aerodynamic parameters were analyzed as functions of longitudinal vocal fold pre-stress, applied air flow, and glottal closure insufficiency. Dimensions of the vocal folds were measured and histological data were analyzed. Glottal closure characteristics improved for increasing longitudinal pre-stress and applied airflow. For the subglottal pressure signal only the cepstral peak prominence showed dependency on glottal closure. In contrast, vibrational, acoustic, and aerodynamic parameters were found to be highly dependent on the degree of glottal closure: The more complete the glottal closure during phonation, the better the aerodynamic and acoustic characteristics. Hence, complete or at least partial glottal closure appears to enhance acoustic signal quality. Finally, results validate the ex vivo rabbit larynx as an effective model for analyzing the phonatory process.

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“…5) Recently, researchers demonstrated that the methods used to analyze HSV data can be clinically useful in documenting the characteristics of vocal fold vibrations in patients with various vocal fold pathologies and in exploring vibratory disturbances to estimate the severity of dysphonia. 1,[9][10][11] There are still problems with the use of HSV in clinical practice, including a lack of immediate feedback during examination, considerable waiting time before kymographic visualization, a recording duration limited to seconds, and extreme demands for storage space. 12) The recorded HSV data can be analyzed frame by frame to evaluate the entire vocal fold vibration.…”

Section: Introductionmentioning

confidence: 99%

Post-Processing of High-Speed Video-Laryngoscopic Images to Two-Dimensional Scanning Digital Kymographic Images

Cha¹,

Wang²,

Jang³

et al. 2017

J Korean Soc Laryngol Phoniatr Logop

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Background and Objectives：High-speed videolaryngoscopy (HSV) is the only technique that captures the true intra-cycle vibratory behavior of the vocal folds by capturing full images of the vocal folds. However, it has problems of no immediate feedback during examination, considerable waiting time for digital kymography (DKG), recording duration limited to a few seconds, and extreme demands for storage space. Herein, we demonstrate a new post-processing method that converts HSV images to two-dimensional digital kymography (2D-DKG) images, which adopts the algorithm of 2D videokymography (2D VKG). Materials and Methods：HSV system was used to capture images of vocal folds. HSV images were post-processed in Kay image-process software (KIPS), and conventional DKG images were retrieved. Custom-made post-processing system was used to convert HSV images to 2D-DKG images. The quantitative parameters of the post-processed 2D-DKG images was validated by comparing these parameters with those of the DKG images. Results：Serial HSV images for all phases of vocal fold vibratory movement are included. The images were converted by the scanning method using U-medical image-process software. Similar to conventional DKG, post-processed 2D DKG image from the HSV image can provide quantitative information on vocal fold mucosa vibration, including the various vibratory phases. Differences in amplitude symmetry index, phase symmetry index, open quotient, and close quotient between 2D-DKG and DKG were analyzed. There were no statistical differences between the quantitative parameters of vocal fold vibratory movement in 2D-DKG and DKG. Conclusion：The post-processing method of converting HSV images to 2D DKG images could provide clinical information and storage economy. KEY WORDS： Vocal fold vibrationㆍHigh-speed imageㆍTwo-dimensional scanning digital kymographyㆍ Image post-processingㆍVoice.

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Quantitative Analysis of Vocal Fold Vibration in Vocal Fold Paralysis With the Use of High-speed Digital Imaging

Cited by 14 publications

References 45 publications

Impact of Subharmonic and Aperiodic Laryngeal Dynamics on the Phonatory Process Analyzed in Ex Vivo Rabbit Models

Impact of Subharmonic and Aperiodic Laryngeal Dynamics on the Phonatory Process Analyzed in Ex Vivo Rabbit Models

Investigation of phonatory characteristics using ex vivo rabbit larynges

Post-Processing of High-Speed Video-Laryngoscopic Images to Two-Dimensional Scanning Digital Kymographic Images

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