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Three-dimensional transient and harmonic shear-wave scattering by a soft cylinder for dynamic vascular elastography
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10.1121/1.2973194
/content/asa/journal/jasa/124/4/10.1121/1.2973194
http://aip.metastore.ingenta.com/content/asa/journal/jasa/124/4/10.1121/1.2973194
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Left: 3D view of the reconstructed -mode ultrasonic image of the experimentally tested heterogeneous medium. There is no echogenicity contrast between the agar-gelatin cylindrical inclusion (represented in the image) and its surrounding soft medium. Right: 3D representation of the plane SW scattering problem. The incident plane wave makes an angle of with its propagation direction and is inclined in the plane from the axis by an angle .

Image of FIG. 2.
FIG. 2.

Left: incident transient wave temporal form used in experiments and simulations. The wave is composed of six modulated pulses with 350 Hz central frequency. Right: the discretized incident wave spectrum representing the calculation points (●).

Image of FIG. 3.
FIG. 3.

(Color online) A schematic representation of the experimental setup: the SW generation and the ultrasonic acquisition devices.

Image of FIG. 4.
FIG. 4.

(Color online) 3D representation of experimental (left) and simulated (right) normalized stationary displacement fields with . The top and bottom images correspond to the scattering of 350 and 450 Hz harmonic incident waves, respectively.

Image of FIG. 5.
FIG. 5.

(Color online) 2D representation of experimental (left) and simulated (right) normalized stationary displacement fields in the plane (corresponding to ). The top and bottom images correspond to the scattering of 350 and 450 Hz harmonic incident waves, respectively. The measured inclination , in the plane , equals .

Image of FIG. 6.
FIG. 6.

Comparison of the experimental and simulated stationary displacements along the axis in the plane for (a) a 350 Hz harmonic incident wave and (b) for a 450 Hz harmonic incident wave (— experimental; simulation). The double arrow, in the top of figures, designates the inclusion spatial location.

Image of FIG. 7.
FIG. 7.

Comparison of experimental and simulated stationary displacements along the axis into the inclusion for (a) the 350 Hz harmonic incident wave and (b) for the 450 Hz harmonic incident wave (—– experimental; simulation).

Image of FIG. 8.
FIG. 8.

(Color online) Time-varying 3D representation of the transient wave excitation scattered by the soft cylindrical inclusion. The view represents the half of the volume to visualize the behavior of the wave into the inclusion during the propagation. Inclination and incidence angles, and , were equal to and , respectively.

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/content/asa/journal/jasa/124/4/10.1121/1.2973194
2008-10-01
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Three-dimensional transient and harmonic shear-wave scattering by a soft cylinder for dynamic vascular elastography
http://aip.metastore.ingenta.com/content/asa/journal/jasa/124/4/10.1121/1.2973194
10.1121/1.2973194
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