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A Real-Time Slow-Motion Video Storboscope for NON-Intrusive Diagnostics of the Larynx Vibration

Stasicki, B. and Meier, G.E.A. and Schultz, H.-W. (1999) A Real-Time Slow-Motion Video Storboscope for NON-Intrusive Diagnostics of the Larynx Vibration. In: Physical Flows and Flow-Structure Interactions. EUROMECH 389, Graz/Austria, 20.- 24.April 1999.

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The endovideostroboscopy of the larynx became a powerful tool for the study of vocal physiology, assessment of the fold abnormalities, motion impairments and functional disorders, as well as for the early diagnosis of vocal cord diseases like cancer and pathologies like nodules, carcinoma, polyps and cysts. A novel computer controlled high-speed video stroboscope has been developed and applied for the examination and recording of human laryngeal vibration. In contrast to the standard stroboscopes it does not utilie pulsed light for the objekt illumination. Instead, a special asynchronously shuttered video camera triggered by the oscillating object has been used. In the case of the larynx inspection the trigger pulses have been picked up via a laryngophone. The stroboscope system includes a specially designed and patented digital phase shifter. This device generates a frequency independent phase shift according to the on-screen edited table. The phase can be changed with an adjustable speed in user selected steps. Thus, the stroboscope provides a stop phase and slow motion observation in real time with simultaneous recording of the periodically moving objects, i.e. the desired position of the folds or their virtual slowed down vibration speed does not depend of the voice pitch. Sequences of hundreds of high resolution frames (660H x 494V or 762H x 582V according to the EIA or CCIR standards, respectively) can be stored on the hard disk in the BMP, compressed TIFF or AVI formats. Afterwards they can be played back frame-by-frame or as a video sequence, evaluated, exported, printed out and transmitted via computer networks. This System principel and the application results in form of recorded frame sequences are presented

Item URL in elib:https://elib.dlr.de/13495/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1999,
Title:A Real-Time Slow-Motion Video Storboscope for NON-Intrusive Diagnostics of the Larynx Vibration
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schultz, H.-W.Universitäts Klinikum GöttingenUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Physical Flows and Flow-Structure Interactions
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Larynx examination, video stroboscope, slow motion, phase shifter, video recording
Event Title:EUROMECH 389, Graz/Austria, 20.- 24.April 1999
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik
Deposited By: DLR-Beauftragter, elib
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:32

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