Figure 5

Characteristics of a 30 MHz high-frequency ultrasound transducer by hydrophone measurement. (A,B) show that the lateral resolution is approximately 60 µm in both the x-axis and in y-axis. (C) The axial resolution with approximately 500 µm at −3 dB is displayed. (D,E) exhibit the acoustic intensity of Ispta (mW/cm2) and Isppa (W/cm2), respectively. The acoustic pressure of the transducer is illustrated in (F).