What's CET ?
Capacitive Electric Transfer (CET) is a method that allows the RF electrical current to be transferred “by capacity” (principle of the electrical capacitor) to the patient’s body via a moveable external application electrode. This is covered with an insulating film which acts as dielectric and the body acts as a second plate of the capacitor.
A return plate closes the circuit. The electric circulation through the resistive medium formed by the live tissues increases its temperature.
What's RET ?
The Resistive Electrical Transfer (RET), introduced in 1994, is different from the CET in that basically the application electrode is not insulated, allowing the current to be transferred directly to the patient with less dispersion, thus obtaining an increase in temperature at a greater depth.