System and method for estimating a treatment region for a medical treatment device and for interactively planning a treatment of a patient

A system and method for planning and controlling a medical treatment device is provided. The system includes a memory; a processor coupled to the memory; and a treatment control module stored in the memory and executable by the processor. In one aspect, the treatment control module generates an estimated treatment region which is an estimate of a treatment region which would have been derived as a result of a numerical model analysis. The estimated treatment region is generated using a fraction of the time it takes to generate the region using the numerical model analysis. In another aspect, the treatment control module graphically displays a continuously changing treatment region in real time as a user moves at least one of the electrodes. This allows the user to more precisely and effectively plan and treat a target region.