Table 2. Comparison of Technical Parameters and Measured Size of Ablation Zones in DSM-RFA and SSM-RFA Groups.
| Variable | Total | Single HCC | ||||
|---|---|---|---|---|---|---|
| SSM-RFA | DSM-RFA | P* | SSM-RFA | DSM-RFA | P* | |
| No. of HCC | 259 | 57 | 229 | 47 | ||
| Dmx (cm) | 4.48 ± 1.02 | 5.04 ± 1.11 | < 0.001 | 4.58 ± 1.01 | 5.13 ± 1.11 | 0.01 |
| Dmi (cm) | 3.38 ± 0.82 | 3.76 ± 0.85 | 0.002 | 3.45 ± 0.81 | 3.79 ± 0.88 | 0.01 |
| Dv (cm) | 4.39 ± 1.24 | 4.56 ± 1.14 | 0.331 | 4.45 ± 1.22 | 4.56 ± 1.16 | 0.59 |
| Dmi/Dmx ratio | 0.76 ± 0.14 | 0.76 ± 0.14 | 0.874 | 0.77 ± 0.14 | 0.75 ± 0.14 | 0.54 |
| Ablation volume (cm3) | 38.08 ± 23.30 | 48.27 ± 28.55 | 0.004 | 40.09 ± 23.58 | 49.58 ± 29.44 | 0.04 |
| Ablation volume/time (cm3/min) | 3.03 ± 1.99 | 4.20 ± 2.07 | < 0.001 | 3.16 ± 2.03 | 4.04 ± 2.04 | 0.02 |
| Effectively ablated volume (cm3) | 23.86 ± 18.33 | 32.21 ± 24.30 | 0.017 | 25.15 ± 18.58 | 33.35 ± 25.97 | 0.02 |
| Effectively ablated volume/time (cm3/min) | 1.93 ± 1.68 | 2.76 ± 1.60 | 0.001 | 2.02 ± 1.72 | 2.63 ± 1.47 | 0.01 |
| Energy (kcal) | 16.79 ± 9.84 | 17.75 ± 10.43 | 0.510 | 17.37 ± 10.11 | 18.84 ± 11.02 | 0.37 |
| Energy/time (kcal/min) | 1.25 ± 0.50 | 1.43 ± 0.37 | 0.003 | 1.27 ± 0.47 | 1.41 ± 0.40 | 0.04 |
| Ablation time (min) | 13.70 ± 5.90 | 12.35 ± 6.10 | 0.121 | 13.69 ± 5.58 | 13.13 ± 6.31 | 0.54 |
*Data were evaluated using independent t test. Dmi = minimum diameter of ablation zone, Dmx = maximum diameter of ablation zone, Dv = vertical diameter of ablation zone