Title: Synchronous detector as a new paradigm for automatic microembolus detection

Authors: Jean-Marc Girault; Zheng Zhao

Addresses: UMR INSERM U930, Signal and Imaging Group, PRES Centre-Val de Loire University, 7 avenue Marcel Dassault, 37200 Tours, France ' UMR INSERM U930, Signal and Imaging Group, PRES Centre-Val de Loire University, 7 avenue Marcel Dassault, 37200 Tours, France

Abstract: We propose here a new detector paradigm based on synchronous detection. Unlike standard energy detectors, this kind of detector uses the pseudo-cyclostationarity properties of blood Doppler signals. The new detector, which is synchronised with cardiac rhythm, was compared to a gold standard and a standard energy detector. Detectors were evaluated according to clinical recordings from patients with carotid stenoses. The results showed that it was possible to detect inaudible microemboli. The detection rate was improved by 30% and the false alarm rate was below 2%.

Keywords: blood Doppler signals; ultrasound; biomedical signals; synchronous detection; cyclostationarity; automatic microembolus detection; synchronous detectors; cardiac rhythm; heart rhythm; carotid stenoses; inaudible microemboli.

DOI: 10.1504/IJBET.2014.059059

International Journal of Biomedical Engineering and Technology, 2014 Vol.14 No.1, pp.60 - 70

Received: 24 Jun 2013
Accepted: 30 Nov 2013
Published online: 16 Oct 2014 *

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