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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2015 Jan;62(1):97–107. doi: 10.1109/TUFFC.2014.006679

Fig. 5.

Fig. 5

Pulse-echo measurement results. Time-domain echo signals and frequency responses of (a) a representative 35-MHz transducer, (b) 90-MHz transducer, (c) 120-MHz transducer, and (d) 150-MHz transducer.