scholarly journals Chaotic signal denoising method based on independent component analysis and empirical mode decomposition

2013 ◽  
Vol 62 (5) ◽  
pp. 050201
Author(s):  
Wang Wen-Bo ◽  
Zhang Xiao-Dong ◽  
Wang Xiang-Li
Keyword(s):  
Independent Component Analysis ◽  
Empirical Mode Decomposition ◽  
Component Analysis ◽  
Chaotic Signal ◽  
Independent Component ◽  
Signal Denoising ◽  
Denoising Method ◽  
Mode Decomposition

scholarly journals Doppler flow phantom failure detection by combining empirical mode decomposition and independent component analysis with short time Fourier transform

ACTA IMEKO ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 185
Author(s):  
Giorgia Fiori ◽  
Fabio Fuiano ◽  
Andrea Scorza ◽  
Maurizio Schmid ◽  
Silvia Conforto ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Independent Component Analysis ◽  
Empirical Mode Decomposition ◽  
Component Analysis ◽  
Independent Component ◽  
Short Time Fourier Transform ◽  
Doppler Flow ◽  
Mode Decomposition ◽  
Flow Phantom ◽  
Short Time

<p class="Abstract">Nowadays, objective protocols and criteria for the monitoring of phantoms failures are still lacking in literature, despite their technical limitations. In such a context, the present work aims at providing an improvement of a previously proposed method for the Doppler flow phantom failures detection. Such failures were classified as low frequency oscillations, high velocity pulses and velocity drifts. The novel objective method, named EMoDICA-STFT, is based on the combined application of the Empirical Mode Decomposition (EMD), Independent Component Analysis (ICA) and Short Time Fourier Transform (STFT) techniques on Pulsed Wave (PW) Doppler spectrograms. After a first series of simulations and the determination of adaptive thresholds, phantom failures were detected on real PW spectrograms through the EMoDICA-STFT method. Data were acquired from two flow phantom models set at five flow regimes, through a single ultrasound (US) diagnostic system equipped with a linear, a convex and a phased array probe, as well as with two configuration settings. Despite the promising outcomes, further studies should be carried out on a greater number of Doppler phantoms and US systems as well as including an in-depth investigation of the proposed method uncertainty.</p>

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