Table 3. Comparison between MRgHIFU and USgHIFU for Complete Ablation of Uterine Fibroids.
| Variable | MRgHIFU (n = 10) | USgHIFU (n = 22) | P |
|---|---|---|---|
| NPV (cm3)* | 127.8 ± 70.2 | 118.9 ± 55.0 | 0.632 |
| Acoustic energy (kJ) | 483.0 ± 248.2 | 463.2 ± 156.4 | 0.412 |
| EEF (J/mm3) | 5.1 ± 3.0 | 4.7 ± 2.5 | 0.165 |
| Acoustic power (W) | 310.2 ± 62.5 | 391.6 ± 16.6 | 0.048 |
| Treatment time (min) | 174.5 ± 42.2 | 114.4 ± 39.2 | 0.021 |
| Treatment speed (cm3/h) | 42.2 ± 25.6 | 70.9 ± 41.9 | 0.018 |
*Sum of fibroid's NPV in each patient. EEF = energy-efficiency factor, NPV = non-perfused volume