Table 2. Comparison of Technical Parameters between DSM-RFA and SSM-RFA Groups.
| DSM-RFA (n = 48†) | SSM-RFA (n = 46†) | P | |
|---|---|---|---|
| Dmin/time, mm/min | 2.9 ± 1.2 | 2.9 ± 1.5 | 0.849 |
| Dmin, cm | 3.5 ± 0.7 | 3.4 ± 0.6 | 0.806* |
| Dmax, cm | 4.9 ± 1.0 | 4.7 ± 0.8 | 0.174* |
| Dv, cm | 4.4 ± 1.1 | 4.5 ± 1.1 | 0.308 |
| Ablation time, min | 14.3 ± 6.7 | 14.1 ± 6.1 | 0.841 |
| Energy, kcal | 23.8 ± 12.1 | 17.1 ± 8.4 | 0.004 |
| Energy/time, kcal/min | 1.7 ± 0.2 | 1.2 ± 0.3 | < 0.001* |
| Average impedance, Ω | 93.9 ± 9.0 | 73.7 ± 9.3 | < 0.001* |
| Ablation volume, cm3 | 41.1 ± 20.9 | 39.6 ± 18.1 | 0.810 |
| Ablation volume/time, cm3/min | 3.3 ± 1.8 | 3.0 ± 1.2 | 0.976 |
| Effective ablation volume, cm3 | 24.5 ± 14.7 | 23.0 ± 12.1 | 0.764 |
| Effective ablation volume/time, cm3/min | 1.9 ± 1.2 | 1.8 ± 1.0 | 0.934 |
All data are mean ± SD. Variables that passed Shapiro-Wilk normality test were compared using independent t test (*) and others were compared using Mann-Whitney test. †Number of HCC nodules. Dmax, Dmin = the longest and shortest diameters, respectively, of the ablation zone on the axial image with the largest ablation area, Dv = longest vertical diameter of ablation zone on coronal plane