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  Patronage of the Polish Society of Audiology and Phoniatrics

vol 13. no 3. September 2014  

 Original articles
Assessment of vocal folds phonation by means of computer analysis of laryngovideostroboscopic images– a pilot study
Bartosz Kopczyński, Paweł Strumiłło, Ewa Niebudek-Bogusz

Introduction. Medical imaging techniques enable determination
of novel visualisation modalities of the vocal folds during
phonation and definition of parameters that can aid the
otolaryngologist/phoniatrician in a more precise diagnosis of
voice disorders.
Aim. Application of computer vision algorithms for qualitative
and quantitative analysis of vocal-folds phonation vibrations.
Materials and methods. Videostroboscopic examinations
of the glottis were carried out for 15 individuals divided into
3 groups including five subjects each: with diagnosed nodules,
with glottal insufficiency, and with no voice disorders. Image
pre-processing and image segmentation algorithms were applied.
Signals of the glottis area for consecutive phonation cycles
were derived. Glottovibrograms were also built which facilitate
spatio-temporal visualisation of the vibrating vocal folds.
Results. The geometric parameters of the glottis area for each
image in the stroboscopic video have been determined. The
average width profiles of the glottis area for the closure phase
of the glottal cycle have been computed for each group of the
examined patients.
Conclusions. The conducted pilot study has confirmed that
computer aided imaging methods could be applied in the
qualitative and quantitative analysis of the videostroboscopic
images showing the phonatory motions of the vocal folds.

keywords: zaburzenia głosu, diagnostyka obrazowa głośni, komputerowa analiza obrazów medycznych wideostroboskopia, voice disorders, medical imaging of glottis, medical image computing, videostroboscopy

pages: from 139 to 146

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