Fig. 2From: Low-Intensity Focused Ultrasound-Augmented Multifunctional Nanoparticles for Integrating Ultrasound Imaging and Synergistic Therapy of Metastatic Breast Cancera Ultrasound images of both 2D and CEUS under different LIFU intensities and duration times. b The corresponding grayscale intensity at different intensities and time of 2D imaging and c CEUS imaging (**p < 0.01, n = 3)Back to article page