Recording and processing aneurysmal vibration signals in dogs.
J Biomed Eng
; 10(4): 336-42, 1988 Jul.
Article
em En
| MEDLINE
| ID: mdl-3070164
A specially designed computerized acoustic aneurysm detection system has been developed and used for recording the acoustic signal produced by aneurysms in dogs. Two transducer types, a modified horn-coupled microphone and a microvascular intra-operative Doppler flowmeter have been used. The results show that the aneurysm signal is time-varying and that a stronger vibration signal can be obtained if a proximal stenosis presents. With direct contact recording, the acoustic signals from aneurysms and parent arteries show different characteristics that can be easily distinguished. The aneurysm signals are processed by spectrograms, and a smoothing technique for suppressing noise is introduced.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Acústica
/
Processamento de Sinais Assistido por Computador
/
Ultrassonografia
/
Aneurisma
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Revista:
J Biomed Eng
Ano de publicação:
1988
Tipo de documento:
Article
País de publicação:
Reino Unido