Estimation of glottal area function using stereo-endoscopic high-speed digital imaging

2010 ◽  
Author(s):  
Hiroshi Imagawa ◽  
Ken-Ichi Sakakibara ◽  
Isao T. Tokuda ◽  
Mamiko Otsuka ◽  
Niro Tayama
Keyword(s):  
Digital Imaging ◽  
High Speed ◽  
Area Function

The bright future of digital imaging in scanning electron microscopy

1993 ◽  
Vol 51 ◽  
pp. 768-769
Author(s):  
M. T. Postek ◽  
A. E. Vladar
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Digital Imaging ◽  
High Speed ◽  
High Performance ◽  
Mass Storage ◽  
Analog To Digital ◽  
Central Processing ◽  
Digital Imaging Technology ◽  
Scanning Electron

One of the major advancements applied to scanning electron microscopy (SEM) during the past 10 years has been the development and application of digital imaging technology. Advancements in technology, notably the availability of less expensive, high-density memory chips and the development of high speed analog-to-digital converters, mass storage and high performance central processing units have fostered this revolution. Today, most modern SEM instruments have digital electronics as a standard feature. These instruments, generally have 8 bit or 256 gray levels with, at least, 512 × 512 pixel density operating at TV rate. In addition, current slow-scan commercial frame-grabber cards, directly applicable to the SEM, can have upwards of 12-14 bit lateral resolution permitting image acquisition at 4096 × 4096 resolution or greater. The two major categories of SEM systems to which digital technology have been applied are:In the analog SEM system the scan generator is normally operated in an analog manner and the image is displayed in an analog or "slow scan" mode.

Vocal Fold Vibratory Characteristics in Normal Female Speakers From High-Speed Digital Imaging

2012 ◽  
Vol 26 (2) ◽  
pp. 239-253 ◽  
Author(s):  
Kartini Ahmad ◽  
Yuling Yan ◽  
Diane M. Bless
Keyword(s):  
Digital Imaging ◽  
Vocal Fold ◽  
High Speed ◽  
Normal Female

scholarly journals Relation between Voice Quality and Pathological Vibratory Patterns Using High-Speed Digital Imaging.

1999 ◽  
Vol 102 (3) ◽  
pp. 354-367 ◽  
Author(s):  
Mamiko Miyaji ◽  
Yoshitake Iwamoto ◽  
Makoto Oda ◽  
Seiji Niimi
Keyword(s):  
Digital Imaging ◽  
High Speed ◽  
Voice Quality

High-speed digital imaging of the neoglottis after supracricoid laryngectomy with cricohyoidoepiglottopexy

2010 ◽  
Vol 142 (4) ◽  
pp. 598-604 ◽  
Author(s):  
Koichiro Saito ◽  
Miwako Kimura ◽  
Hiroshi Imagawa ◽  
Takaharu Nito ◽  
Niro Tayama ◽  
...  
Keyword(s):  
Digital Imaging ◽  
High Speed ◽  
Supracricoid Laryngectomy

Analysis of vocal fold vibration on prosodic events by high speed digital imaging systems

2002 ◽  
Vol 112 (5) ◽  
pp. 2445-2445
Author(s):  
Masanobu Kumada ◽  
Noriko Kobayashi ◽  
Hajime Hirose ◽  
Niro Tayama ◽  
Hiroshi Imagawa ◽  
...  
Keyword(s):  
Digital Imaging ◽  
Vocal Fold ◽  
High Speed ◽  
Imaging Systems ◽  
Vocal Fold Vibration ◽  
Digital Imaging Systems

Observation of Eardrum Movements during Quasi-Static Pressure Changes by High-Speed Digital Imaging

1999 ◽  
Vol 4 (3-4) ◽  
pp. 150-155 ◽  
Author(s):  
Ulrich Vorwerk ◽  
Gunnar Steinicke ◽  
Klaus Begall
Keyword(s):  
Digital Imaging ◽  
High Speed ◽  
Static Pressure ◽  
Pressure Changes

High-speed digital imaging laryngoscopy of the neoglottis following supracricoid laryngectomy with cricohyoidoepiglottopexy

2010 ◽  
Vol 124 (11) ◽  
pp. 1234-1238 ◽  
Author(s):  
S Hayashi ◽  
H Hirose ◽  
N Tayama ◽  
H Imagawa ◽  
M Nakayama ◽  
...  
Keyword(s):  
Fundamental Frequency ◽  
Sound Source ◽  
Digital Imaging ◽  
High Speed ◽  
Imaging System ◽  
Vocal Performance ◽  
Inverse Filtering ◽  
Imaging Analysis ◽  
Supracricoid Laryngectomy ◽  
Digital Imaging System

AbstractObjectives:This study aimed to analyse vocal performance and to investigate the nature of the neoglottal sound source in patients who had undergone supracricoid laryngectomy with cricohyoidoepiglottopexy, using a high-speed digital imaging system.Methods:High-speed digital imaging analysis of neoglottal kinetics was performed in two patients who had undergone supracricoid laryngectomy with cricohyoidoepiglottopexy; laryngotopography, inverse filtering analysis and multiline kymography were also undertaken.Results:In case one, laryngotopography demonstrated two vibrating areas: one matched with the primary (i.e. fundamental) frequency (75 Hz) and the other with the secondary frequency (150 Hz) at the neoglottis. In case two, laryngotopography showed two vibrating areas matched with the fundamental frequency (172 Hz) at the neoglottis. The interaction between the two areas was considered to be the sound source in both patients. The waveform of the estimated volume flow at the neoglottis, obtained by inverse filtering analysis, corresponded well to the neoglottal vibration patterns derived by multiline kymography. These findings indicated that the specific sites identified at the neoglottis by the present method were likely to be the sound source in each patient.Conclusions:High-speed digital imaging analysis is effective in locating the sites responsible for voice production in patients who have undergone supracricoid laryngectomy with cricohyoidoepiglottopexy. This is the first study to clearly identify the neoglottal sound source in such patients, using a high-speed digital imaging system.

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