Table 2.
Characteristics of the high-intensity focused ultrasound ablation therapy.
| Parameter | HIFU alone (n = 30) | CEUS+HIFU (n = 34) | P |
| Sonication power (W) | 399.4 ± 1.9 | 204.3 ± 37.6 | <.001a |
| Treatment time (min) | 181.3 ± 36.3 | 44.2 ± 15.4 | <.001a |
| Sonication time (s) | 2824.1 ± 419.8 | 358.4 ± 271.3 | <.001a |
| Total energy used (kJ) | 1127.8 ± 165.4 | 76.2 ± 58.8 | <.001a |
| Energy efficiency factor (J/mm3) | 10.9 ± 6.3 | 1.6 ± 0.3 | <.001a |
| Non-perfused volume (cm3) | 136.0 ± 73.8 | 161.6 ± 129.1 | .872a |
| Fractional ablation (%) | 70.0 ± 7.6 | 70.9 ± 13.5 | .788a |
| Massive grayscale changes n, (%) | 25/30 (83.3%) | 34/34 (100%) | .190b |
Data are presented as the mean ± standard deviation or n/N (%). CEUS = contrast-enhanced ultrasonography, HIFU = high-intensity focused ultrasound, MGSC = massive grey scale change.
a
t test.
b
Chi-squared test.