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Videokymography System_ Model 8900

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									Videokymography System,
       Model 8900
    (Kayelemetrics, 2005)
   What is Videokymography?
• VKG (videokymography) is a modified
  video camera that is coupled to a standard
  rigid endoscope and a constant light
  source.
• It is able to capture high-speed motion
  such as, vocal fold vibration.
    Where was VKG developed?
      Was VKG ever tested?
• VKG was developed at the university of
  Groningen in the Netherlands by Dr. Harm
  Schutte and Dr. Jan Svec.
• VKG was clinically tested by Dr. Frantisek
  Sram from the Center for Communication
  Disorders in Prague on hundreds of
  patients.
What important properties can VKG
       capture specifically?
Videokymographic images can reflect…
  -open and close phases of the glottal
   cycle.
  -opening and closing movements.
  -propagation of mucosal waves
  -displacements of the upper and lower
    vocal fold margins.
 There are two
modes of the VKG
   camera..
The standard mode displays a black-and-
 white video image for proper orientation.
 The high-speed mode selects a single line from
the standard image and displays it 8000 times per
                    second.
Some things you should know…

• VKG is the ideal complement to
  stroboscopy given its unique capabilities.
• Although VKG is not as intuitive as
  stroboscopy, it allows direct viewing of
  vocal fold behaviors, which may not be
  observable with a stroboscopic image.
            For example…
• VKG allows the direct observation of vocal
  fold motion, even if the motion is aperiodic.
• Consequently, diplophonia, voicing
  initiation, vocal fry, creaky voice, biphonia
  and aperiodicity can be viewed directly.
Videokymography fills a
key role in broadening the
   comprehension of
  phonatory dynamics!

								
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