Intracranial blood flow noise measuring and analyzing system were developed to detect cerebrovascular diseases in their early stage.
PVDF-film based sensors working on the closed eyelid was designed to effectively measure the sound known as the bruit'Fast Fourier transform spectrums and Wigner distributions were used as analyzing methods to clarify both the precise spectrum and the time variance of the signals.
Thirty normal people without any history of cerebrovascular disease were tested with the system to estimate the characteristics of the background noise.
Thirteen patients, including eight stenosis, four aneurism, and one occlusion, were studied with the system.
Mots-clés Pascal : Article synthèse, Maladie, Hémodynamique, Neurophysiologie, Transformation Fourier rapide, Bruit parasite signal, Rapport signal bruit, Film(matière plastique), Biodétecteur, Méthode médicale non invasive, Expérience
Mots-clés Pascal anglais : Noninvasive diagnosis, Cerebrovascular disease, Blood flow noise, Wigner distribution, Reviews, Diseases, Hemodynamics, Neurophysiology, Fast Fourier transforms, Spurious signal noise, Signal to noise ratio, Plastic films, Biosensors, Noninvasive medical procedures, Experiments
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0125299
Code Inist : 002B26O. Création : 199608.