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. Author manuscript; available in PMC: 2009 Oct 5.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Mar;55(3):602–618. doi: 10.1109/TUFFC.2008.685

Fig. 10.

Fig. 10

Simulation and laboratory comparisons of a full round lens beam performance at 37°C (a)–(e) and 21°C (f)–(j) water bath conditions. The Schlieren images (a) and (f) show elevation focusing with a narrow band signal at 7.25 MHz at warm and cool temperatures with image dimensions of 10-mm total elevation width and a depth of 37 mm. The simulation plot sets [(b), (c), (e), and (g), (h), (j)] show the expected one-way elevation beam results for the same plot dimensions as the Schlieren, but with the normalized-at-every-depth plot intensity ranges of 18 dB, 18 dB, and 60 dB, respectively. The elevation beam profiles (d) and (i) show a normalized comparison of predicted profiles (solid) and hydrophone data (points) collected at a depth of 20 mm with a narrow-band 4-MHz test signal. The calculated elevation peak pressures normalized to a no-lens condition in a cool bath are −5.9 dBw and −9.5 dBw for the warm and cool baths, respectively.