Endoscopie approach to voice disorders part 2. Recording of vocal fold vibration by laryngostroboscope - Matching of laryngoscope and laryngostroboscope-

Abstract

Adequate matching for video recording can be obtained by a rigid telescope in combination with a laryngostroboscope by properly adjusting the white balance for the strobe light connected to a CCD video camera and adapter lens with the proper magnification rate. Care must be exercised in the adjustment of the white balance of the strobe light and the positioning of the light guide from the strobe light source because electronic videoendoscope manufacturers do not make laryngostroboescopes and they assume use of their own brand of light source, and the color temperature and brightness as well as the diameter of the hole for the light guide insertion are different from those of the strobe light. Although the image quality obtained by a 1/3" type color 3CCD used in combination with a rigid telescope is superior to that of the extremely small color 1CCD located on the tip of today's video-electronic endoscopes, video-electronic endoscopes offer the advantage of providing close-up images by more closely approaching the vocal fold than a rigid telescope. It is therefore important to use both endoscopes while making best use of the characteristics of each.