A Quasi-Local Method for Instantaneous Frequency Estimation with Application to Structural Magnetic Resonance Images

Ulloa Cerna, Alvaro Emilio ;   Rodriguez, Paul ;   liu, Jingyu ;   Calhoun, Vince ;   Pattichis, Marios

Tags Nonstationary processing of biomedical signalsTime-frequency analysis of biosignalsNonlinear analysis of biomedical signals

Spatially-varying signal content can be effectively modeled using amplitude modulation-frequency modulation (AM-FM) representations. The AM-FM...

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Computation of Resting State Networks from Fmri through a Measure of Phase Synchrony

Villafañe-Delgado, Marisel ;   Zhu, David ;   Aviyente, Selin

Tags Nonlinear synchronization of biomedical signalsConnectivity measurementsTime-frequency analysis of biosignals

Resting-state fMRI (rs-fMRI) studies of the human brain have demonstrated that low-frequency fluctuations can define functionally relevant...

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Diagnosis of Ocular Myasthenia Gravis by Means of Tracking Eye Parameters

Muhammad, Azri ;   Young, Stephanie ;   Lin, Hazel Anne ;   Yang, Zhi ;   Tan, Clement

Tags Nonstationary processing of biomedical signalsTime-frequency analysis of biosignalsSignal processing in physiological systems

Ptosis of the eyelids is a common condition with a myriad of causes. Its management depends on the underlying cause, which can be challenging...

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Directional Dual-Tree Rational-Dilation Complex Wavelet Transform

Serbes, Gorkem ;   Gulcur, Halil Ozcan ;   Aydin, Nizamettin

Tags Nonstationary processing of biomedical signalsTime-scale and wavelets

Dyadic discrete wavelet transform (DWT) has been used successfully in processing signals having non-oscillatory transient behaviour. However,...

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Entropy-Based Multichannel Stationary Measure for Characterization of Motor Imagery Patterns

Martínez-Vargas, Juan David ;   Castro Hoyos, Cristian ;   Castellanos-Dominguez, Germán

Tags Nonstationary processing of biomedical signalsTime-frequency analysis of biosignalsMultivariate signal processing

We propose a novel approach for measuring the stationarity level in a multichannel time-series. This measure is based on stationarity...

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Robust Features for Detection of Crackles: An Exploratory Study

Mendes, Luis ;   de Carvalho, Paulo ;   Teixeira, César ;   Paiva, Rui Pedro ;   Henriques, Jorge

Tags Nonstationary processing of biomedical signalsEmpirical mode decomposition in biosignal analysisNonlinear analysis of biomedical signals

Crackles are adventitious and explosive respiratory sounds that can be classified as fine or coarse. These sounds are usually associated with...

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