An RF heating system for generating precision stray RF fields that can be used to heat materials.

A radio frequency heater is disclosed including a vessel for containing material to be heated and a radio frequency radiating surface.

In this method a radio frequency heater and an oil-water process stream are provided.

The oil movement to recovery wells may be provided by radiofrequency heating or steam flood as in enhanced oil recovery.

The method may also include radio frequency (RF) heating the subterranean formation to establish hydraulic communication between the injector well and the producer well.

The energy delivery elements could be RF heating electrodes in a monopole or dipole arrangement although other energy delivery modalities are also contemplated.

Ultrasound warming can increase blood circulation, accelerate metabolism, improve local tissue nutrition, and enhance enzyme activity.

The heating of the internal walls of the varicoses veins with radio frequency according to the closurefast system is carried out by simple catheterisation and induces the retraction and the sclerosis of veins.