Development of a cerebral vascular audiospectroscope for early, noninvasive and simplified diagnosis of cerebral vascular lesions
| Project/Area Number |
11671363
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Cerebral neurosurgery
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| Research Institution | Shinshu University School of Medicine |
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Principal Investigator |
KYOSHIMA Kazuhiko Shinshu University, Medicine, Associate Prof., 医学部, 助教授 (90126673)
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| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Hirosi Utsunomiya University, Engineering, Assistant Prof., 工学部, 助手 (50272761)
KASUGA Masao Utsunomiya University, Engineering, Professor, 工学部, 教授 (00280909)
OIKAWA Susumu Shinshu University, Medicine, Assistant Prof., 医学部, 助手 (50242699)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2000: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1999: ¥2,800,000 (Direct Cost: ¥2,800,000)
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| Keywords | noninvasive audiospectroscope / blood flow sound / early diagnosis / 早期診断 / 脳血管障害 |
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| Research Abstract |
We used trial equipment to make a preliminary analysis of the influence of an artifact, the spectral analysis of blood flow sounds, in an experimental dos model of aneurysm and occlusion by using different types of sensors or band-pass-filters. On basis of the results of this analysis, we have produced an improved small-scale model of a cerebral vascular auditospectroscope (CeVASS), as well as newly designed soundproof apparatus
With this system, a passive sensor and a band-pass-filter (200Hz-2kHz), we measured and analyzed blood flow sounds of patients with cerebral aneurysms and arterial occlusions (two patients each). The sounds were measured bilaterally at the cervix (bifurcation of the common internal carotid artery), forehead, eyes and the temples. Two patients with an aneurysm and one with an occlusion showed a spectral peak in zones between 250 and 750 Hz. Another study of artifacts in cerebral vascular audiospectroscopy (CeVASS) made it possible to reduce artifacts by a maximum of 3 dB.
To improve the precision of detection with the CeVASS, further basic and clinical studies are required.
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Report
(3 results)
Research Products
(14 results)
