| Project/Area Number |
63480377
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Otorhinolaryngology
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| Research Institution | UNIVERSITY OF TOKYO |
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Principal Investigator |
HIROSE Hajime UNIVERSITY OF TOKYO, FACULTY OF MEDICINE, PROFESSOR, 医学部(医), 教授 (80010031)
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| Co-Investigator(Kenkyū-buntansha) |
IMAIZUMI Satoshi UNIVERSITY OF TOKYO, FACULTY OF MEDICINE, ASSOCIATE PROFESSOR, 医学部, 助教授 (80122018)
KIRITANI Shigeru UNIVERSITY OF TOKYO, FACULTY OF MEDICINE, PROFESSOR, 医学部, 教授 (90010032)
NIIMI Seiji UNIVERSITY OF TOKYO, FACULTY OF MEDICINE, PROFESSOR, 医学部, 教授 (00010273)
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 1989: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1988: ¥4,900,000 (Direct Cost: ¥4,900,000)
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| Keywords | digital imaging / vocal fold vibration / voice signal / voice disorder / グロトグラム |
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| Research Abstract |
A high-speed imaging system for the analysis of vocal fold vibration was developed in the investigators' institution. In the present system, a specially designed lateral-viewing laryngeal tele-endoscope is attached to a single-les reflex camera. A solid-state image sensor Is attached to the back-lid of the camera. When the shutter is released, an image scan is made under computer control, and image signals are stored in an image memory through a high-speed A/D converter. After the data strage, the images can be reproduced and displayed on a CRT screen or recorded on a video recorder. Recording of vocal fold vibration during running speech for the analysis of a transient state was also developed by attaching a fiberscope to the system with modification of the image sensor. Further, simultaneous recordings of acoustic signals and EGG signals were made for the assessment of vocal pathology.
An application of the present system for the analysis of pathological larynx has proved promising. Incomplete glottal closure and asymmetrical or irregular vibratory patterns were easily identified in clinical cases with abnormal voice. The procedure for the recording and analysis of vocal fold fold vibration with the present system are simple and less expensive compared with conventional sliming system. This system has made it possible to perform simultaneous analysis of vocal fold vibration and pathological voices very effectively.
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