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. Author manuscript; available in PMC: 2014 Oct 2.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2014 Oct;61(10):1619–1626. doi: 10.1109/TUFFC.2014.006316

Fig. 4.

Fig. 4

Backlit area of shadow (mean ± SD) from bubbles expanded by the interrogation pulse (normalized to the control case). Bubble removal pulses with amplitudes of 80, 150, and 1700 kPa did not produce a statistically significant change in interrogated bubble shadow area relative to control, while those with amplitudes ranging from 150 – 1100 kPa resulted in a statistically significant reduction. Within the later range, interrogated bubble shadow area was observed to decrease with increasing bubble removal pulse amplitude until reaching a minimum in the vicinity of 310 – 570 kPa. Further increase in bubble removal pulse amplitude resulted in an increase in interrogated bubble shadow area. These trends are correlated to observations from high speed photography in the text.