1. A method, comprising:performing an ablation procedure on biological tissue using radiofrequency (RF) power by delivering a first level of RF power to the tissue;
measuring at respective times a temperature of the tissue; and
when the temperature of the tissue exceeds a preset maximum allowable temperature within a range of 55° C.-65° C., reducing the RF power by delivering a second level of RF power to the tissue,
wherein the first level of RF power is in a range of 70 W-100 W, and the second level of RFt power is in a range of 20 W-60 W.