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. 2019 Jan 2;9(1):48. doi: 10.3390/nano9010048

Figure 4.

Figure 4

Ultrasound images of ONBs. No sample, tap water, and nanobubbles were compared. (A) shows images with a 3 to 5 MHz transducer. (B) shows images for a 6 to 9 MHz transducer. (C) shows images with a 6 to 15 MHz transducer.