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Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound.

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Presentation on theme: "Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound."— Presentation transcript:

1 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Normalized damping factor and phase as function of Womersley numbers at selected radial locations for velocity, VFR, and WSS Figure Legend:

2 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 The experimental hydraulic test rig utilizing multigate PW Doppler US Figure Legend:

3 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Simplified space-time representation (LHS) and 1D sample volume longitudinal real and maximum resolution (RHS) of PW US range system Figure Legend:

4 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Flow characterization results recovered from the original McDonald's work [36] on dog femoral arteries Figure Legend:

5 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Harmonic analysis using 30-term Fourier expansion of sampled velocities at two radial locations for steady (Poiseuille) flow with measured Doppler US velocity profiles Figure Legend:

6 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Reconstructed flow data for steady-state (Poiseuille) flow using first ten harmonics Figure Legend:

7 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Harmonic analysis using 13-term Fourier expansion of sampled velocities at two radial locations for sinusoidal flow excitation and to the right the actual raw Doppler US velocity profiles with velocities close to wall discarded Figure Legend:

8 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Reconstructed flow data for sinusoidal flow excitation with velocity profiles plotted for each T/24-th of a period Figure Legend:

9 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Harmonic analysis using 22-term Fourier expansion of sampled velocities at two radial locations and measured axial velocities for sinusoidal flow excitation with very noisy US measurements and observed flow reversal close to wall Figure Legend:

10 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Reconstructed flow data for sinusoidal flow excitation with flow reversal with reconstructed data showing diminished flow reversal in wall vicinity compared to original Figure Legend:

11 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Harmonic analysis using 23-term Fourier expansion of sampled velocities at two radial locations for triangular flow excitation with raw US velocity profiles at various times within one period Figure Legend:

12 Date of download: 6/26/2016 Copyright © ASME. All rights reserved. From: Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements J. Fluids Eng. 2014;136(4):041102-041102-15. doi:10.1115/1.4026481 Reconstructed flow data for triangular flow excitation using first ten harmonics Figure Legend:


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