Table 2. Heat and Time Used for RFA of Benign Thyroid Nodules.

Variables	RFA with an Adjustable Electrode
RF power (W)	72.9 ± 23.1 (30–125)
Ablation time (min)	22.0 ± 8.9 (9–36)
Total energy (J)	95172.3 ± 56533.3 (45360–247500)
Delivered energy/tumor volume (J/mL)	6088.5 ± 4777.4 (922.5–16266.6)

Values represent mean ± standard deviation; numbers in parenthesis represent range. Total amount of energy applied was calculated by multiplying RF power as watts and ablation time in seconds. RFA = radiofrequency ablation