2017 年 61 巻 1 号 p. 45-47
The aim of this study was to establish a method for observing vocal fold vibration using a transnasal flexible fiberoptic endoscope and a high-speed camera for clinical use. We assembled a high-speed digital imaging system with an ordinary flexible endoscope and a highly sensitive high-speed camera (HAD-D71; DITECT Corporation, Tokyo, Japan) with ISO 5,000,000. The camera had an 8-GB internal storage memory for video capture of up to 7.0 s with the usual setting of 640 × 480 pixels at 4000 fps. Using the nasal route, the system enabled us to observe vocal fold vibration during running speech with adequate brightness and good image quality. Our high-speed digital imaging system with a flexible endoscope can be a useful option to observe vocal fold vibration during running speech and is an alternative to difficult transoral rigid endoscopy in patients complaining of voice problems.
