Patent ID: 7115124

Claim:
A system for ablating an intended volume of a target tissue, the system comprising: a plurality of needle electrodes,, arranged in arrays with odd and even numbers, with the size being suitable for the target tissue and the intended volume of ablation, each of the needle electrodes having a first end and a second end and having plural electrically conductive segments, at least one nonconductive joint, and a needle tip, wherein any of the two neighbor electrically conductive segments are jointed by one of the at least one nonconductive joint and the needle tip is connected to an electrically conductive segment at the first end of the needle electrode; a terminal wire bundle containing plural individual wires at the second end of each needle electrode, each of the individual wires being connected to each of the electrically conductive segments; a RF power supply having two poles, one of the poles being connected to the wires of the terminal wire bundles of the needle electrodes in the arrays of odd numbers, and the other pole being connected to the wires of the terminal wire bundles of the needle electrodes in the arrays of even numbers; switching means for connecting and disconnecting each of the individual wires; and a switch for controlling the power from the power supply to all the electrically conductive segments.