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Table 2 Treatment characteristics at each HIFU session

From: Long-term efficacy of ultrasound-guided high-intensity focused ultrasound treatment of breast fibroadenoma

  Group 1 (n = 19) Group 2 (n = 7)
  1st HIFU 1st HIFU 2nd HIFU
Treated volume (mL), median (range) 0.78 (0.35–2.24)a 2.66 (0.52–3.01) 1.34 (0.65–2.24)
Treated volume (%), mean ± SD 56.96 ± 25.05 36.02 ± 7.92b 58.50 ± 22.34
Total delivered energy (kJ), median (range) 10.1 (4.4–25.4)c 27.7 (7.4–39.6) 16.5 (12.8–31.4)
Energy per treated volume (kJ/mL), median, range 12.4 (6.7–14.3) 13.0 (10.4–14.2) 13.9 (7.1–14.8)
Treatment duration (min) mean ± SD 60.6 ± 22.8d 105.1 ± 38.8 66.3 ± 15.7
Number of treated sites, median (range) 58 (29–149)e 179 (38–221) 95 (40–153)
Hyperechoic marks (%), median (range) 15 (0–31) 10 (0–29) 7 (0–50)
  1. a p < 0.05 compared with group 2 at the 1st HIFU and group 2 at the 2nd HIFU, Mann-Whitney U test, b p < 0.05 compared with group 1 and group 2 at the 2nd HIFU, Student’s t-test, c p < 0.01 compared with group 2 at the 1st HIFU and group 2 at the 2nd HIFU, Mann-Whitney U test, d p < 0.001 compared with group 2 at the 1st HIFU, Student’s t-test, e p < 0.05 compared with group 2 at the 1st HIFU, Mann-Whitney U test