Fig. 2
Acoustic droplet vaporization and CEUS of PPCu. A Optical microscopic images of PPCu after LIFU treatment with different intensities (0 W/cm2, 3 W/cm2 and 8 W/cm2 for 3 min). The scale bar is 5 μm. B B-mode and CEUS mode images of degassed water and PPCu in vitro and in vivo after LIFU stimulation