Table 3.

Ablation of lung tumors in patients

Microwave generator	Antenna	Time	Patients/tumors	Comments
915 MHz 45 W20	14.5 gauge antenna	10 minutes	24 patients with 26 inoperable tumors	Technical success in 100%, without major complications. 1, 3, and 6 months and annually follow, was observed complete necrosis in 61.6% of lesions. Partial necrosis in 30.8% and progression of disease in only one case.
2,450 MHz 120 W or 180 W21	1.8 mm diameter antenna	180 W: 2 minutes in <2 cm tumors, 3.5 minutes in 2–3 cm tumors, 4–6 minutes in 3–5 cm tumors 120 W: 1 minute for 1 cm tumors, 8 minutes for 2.4 cm tumors	23 patients with 29 tumors	Recurrence was assessed at 1, 3, and 6 months after ablation. In 93% of patients ablation was successful, 6 months of local recurrence was identified in 3 of 26 lesions, giving a local control rate of 88%.
902–928 MHz 10–32 W22	14 gauge antenna	10 minutes	10 patients	5 of 10 specimens were clearly measurable with a maximum diameter of ablation of 4.8 cm and volume of zone of ablation was on average 15.1 cm.
915 MHz 45 W23	14.5 gauge antenna	10 minutes	9 patients with 10 tumors	Patients were followed up at 1, 3, and 6 months, concluding that MWA is a valid alternative to other techniques of ablation.

Abbreviation: MVA, microwave ablation.