Microwave ablation utilizes dielectric hysteresis to produce heat within tissue. Dielectric hysteresis occurs when polar molecules in tissue (primarily H 2 O) are forced to continuously realign with an applied, oscillating electromagnetic fi eld. The polar molecules will realign billions of times per second, thus increasing their kinetic energy and temperature by friction. Tissues with a high percentage of water (as in solid organs and tumors) are most conducive to this type of heating and readily absorb microwave energy. Tissue destruction, via coagulation, occurs when tissues are heated to a lethal temperature by the applied electromagnetic frequency of either 915 MHz or 2.45 GHz, which are the only ISM (industrial, scienti fi c, and medical) approved frequencies.
Polar Molecule Ablation Zone Coaxial Cable Microwave Ablation Efficient Ablation
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.