title: Empirical mode decomposition for self-mixing Doppler signals of hemodynamic optical probes.
abstract: A new type of optical probe based on laser Doppler self-mixing technology, for a truly non-contact measurement in a single location, and extraction of the temporal features of the distension wave in the arterial wall, was developed. The monitoring of temporal features allows the assessment of cardiovascular function when measurement is carried out at the carotid artery. An algorithm based on the short-time Fourier transform and empirical mode decomposition was applied to the test setup self-mixing signals for the determination of waveform features, with an accuracy of a few milliseconds and a root mean square error less than 3 ms. In vivo testing signals show great consistency in the measured pulse pressure waveform.
authors: Instrumentation Centre, Physics Department, University of Coimbra, Portugal. taniapereira@lei.fis.uc.pt
authors: Tânia
authors: T
authors: Pereira
authors: Pedro
authors: P
authors: Vaz
authors: Tatiana
authors: T
authors: Oliveira
authors: Inês
authors: I
authors: Santos
authors: Helena C
authors: HC
authors: Pereira
authors: Vânia
authors: V
authors: Almeida
authors: Carlos
authors: C
authors: Correia
authors: João
authors: J
authors: Cardoso
mesh_terms: D000465:Algorithms; D002339:Carotid Arteries / Q000502:physiology; D015150:Echocardiography, Doppler; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted; D013057:Spectrum Analysis; D013997:Time Factors