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. Author manuscript; available in PMC: 2018 Jul 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2017 May 8;64(7):1078–1086. doi: 10.1109/TUFFC.2017.2702010

Fig. 5.

Fig. 5

Phantom and imaging data used for assessing quantitative channel diameter measurements with the developed transducer. Channel diameters are 1.0 mm and 4.0 mm and are at depths of 6 mm and 8 mm from the transducer, respectively. (A) Phantom diagram indicating lumen for transducer and channels, (B) acquired B-mode image before injection of microbubbles into channels, (C) acquired dual-frequency image before injection of microbubbles into channels, and (D) acquired imaging volume after injection of microbubbles into channels.