Fig. 3

The DNA damage and cell viability after the treatment of low-intensity ultrasound combined with 5-FU. a DNA damage was evaluated by the tail moment. b Cell viability in the BEL-7402, Hep G2, and HuH-7. c Cell viability in the Control, US, 5-FU, and US + 5-FU groups with and without NAC. Data was presented as the mean ± SD (n = 6, ^★ p < 0.05 vs. other three groups; ^★★ p < 0.05 NAC-treated vs. NAC-untreated US + 5-FU group)