COMPARATIVE STUDY FOR WAVE SPEED ESTIMATION AT A SINGLE AND TWO MEASUREMENT POINTS
Résumé
Local wave speed is a prognostic detector that allows the analysis of cardiovascular function. Objectives: This study compared wave speed (c) measurements at single-point and two-point techniques. Material and methods: c were determined from the cepstral analysis of the blood flow velocities, which identified the arrivals times of reflected waves. The blood velocities waveforms were measured by using phase-contrast magnetic resonance (PCMR) for 20 subjects on young and old healthy subjects. Local wave speed was estimated through the arrivals time of reflections waves (tr) and the distance separating the measurement site to reflection area (L) or the distance separating the two measurement sites. Results: Our obtained results were in total agreement with reference values reported in the literature. Moreover, the detected results show that there is a high correlation (r=0.87) between the two methods. Conclusion: The analysis of the wave speed variations with advancing age is also achieved out through different regression models.