Figure 3From: Ultrasound stimulation increases proliferation of MC3T3-E1 preosteoblast-like cellsMicroscopic images of MC3T3-E1 cells at the end of LIPUS stimulation. Microscopic images of cell growth after two 10-min ultrasound excitations at 24-h interval and at following ultrasound intensities (a) control, (b) 1.16 mW/cm2, (c) 4.64 mW/cm2, (d) 18.57 mW/cm2, (e) 74.27 mW/cm2, and (f) 464.18 mW/cm2. Magnification × 20.Back to article page