Skip to main content
. Author manuscript; available in PMC: 2022 Jul 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2021 Jun 29;68(7):2419–2431. doi: 10.1109/TUFFC.2021.3065952

Fig. 5.

Fig. 5.

Acoustic pressure maps for the DF array. (a-d) Simulated and (e-h) measured pressure field for the LF array, with the overlay showing measured pressure field for the HF array. Azimuthal beam plots for transmit focus at ~10 mm below the LF array at (a, e) −11.5 mm and (b, f) −0.045 mm in azimuthal positions; pressure amplitudes normalized to the peak value when focused at x =−0.045 mm. The LF beam plots are displayed with −20 dB dynamic range; the HF beam plots are shown with −6 dB, −12 dB and −20 dB contours. (c,g) Elevational pressure fields at 0 mm in azimuth; pressure fields normalized to the on-axis value at each depth. The LF beam plots are displayed with −6 dB dynamic range; the HF beam is shown with −6 dB contour. (d,h) Elevational −6 dB beamwidth over depth for LF (blue) and HF (orange) arrays; effective focal depths are indicated by arrows. The depth-axis of the plots is relative to the probe surface. Image axes are in millimeters.