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Modelling nonlinear ultrasound propagation in absorbing media using the k-Wave toolbox: Experimental validation

dataset
posted on 08.06.2022, 12:58 by Kejia Wang, Emily Teoh, Jiri Jaros, Bradley TreebyBradley Treeby

This data was collected to validate simulations performed using the k-Wave toolbox when the wave propagation is nonlinear and the medium is absorbing.

Experiments were conducted using a diagnostic ultrasound scanner (Sonix RP, Ultrasonix) with a linear array probe (L9-4/38) in both water and olive oil. Measurements were performed using a two-axis automated scanning tank with a 0.4 mm membrane hydrophone. 

The coordinate system used is as follows: X is the elevation direction relative to the transducer (out-of-plane), Y is the lateral (in-plane) direction, Z is the axial direction.

In total, this study contains 12 datasets contained in 4 files as follows.

File 1. X-Y scans of transducer in water with no steering (4 datasets with planes measured at 1.3, 11.1, 21.3, and 31.3 mm from the transducer).

File 2. X-Y scans of transducer in water with a steering angle of 20 degrees (2 datasets with planes measured at 1.3 and 21.3 mm from the transducer).

File 3. Y-Z scans of the transducer in water with steering angles of 0 (no steering) and 20 degrees (2 datasets).

File 4. X-Y scans of transducer in olive oil with no steering (4 datasets with planes measured at 2.4, 12.4, 22.4, 32.4 mm from the transducer).

A MATLAB script is provided to produce simple summary plots of the data.

Notes:

For all X-Y scans, the reported Z-positions are approximate. Z-alignment was performed using a manual translation stage, and the position of the transducer relative to the hydrophone in the first scan plane was estimated using a diagnostic ultrasound image. A more accurate estimate could potentially be obtained using the time-of-flight data for the recorded waveforms.

For dataset 3, the reported X-Y coordinate origin for the scan plane at 2.39mm (dataset1) is not aligned with the X-Y coordinate origin for the other scan planes (dataset2, dataset3, dataset4). This could potentially be corrected, e.g., using acoustic holography and aligning the projections to the measured planes. 

Funding

Australian Research Council/Microsoft Linkage Project LP100100588

NCI National Facility at the Australian National University (ANU) (computational resources)

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