Validating Stereo-Endoscopy with a Synthetic Vocal Fold Model
Endoscopy has long been an important technique for vocal fold visualization, but it is limited to providing only two-dimensional information. To extend its usage, stereo-endoscopy has been developed to provide two views of the larynx from different angles, enabling three-dimensional viewing of the laryngeal structure. Stereo-matching has recently been applied to reconstruct three-dimensional vocal fold motion from stereo-endoscopic measurement [1, 2]. Further information regarding its accuracy and applicability would make it more clinically relevant. To validate the stereo-endoscopy system, a setup of multiple high-resolution cameras and the stereo-endoscopy system simultaneously recorded the surface of synthetic, self-oscillating vocal fold models. The estimated error in the measurement of the three-dimensional location by the stereo-endoscopy system is low in the transverse plane, whereas the error is relatively large in the inferior-superior direction. Although further improvement is needed to provide reliable information on the inferior-superior movement of the vocal folds, we conclude that the stereo-endoscope is applicable to in vivo measurements of absolute distances of the glottis in the transverse plane such as glottal length, width, and area.
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Document Type: Research Article
Publication date: July 1, 2016
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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