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Deployable microwave antenna for treating tissue

Image Number 9 for United States Patent #8343149.

A microwave ablation system for treating tissue includes an assembly of antennas adapted to connect to a microwave generator. The microwave generator generates microwave energy. Each antenna of the assembly of antennas includes inner and outer conductors. The inner conductor has a length. The outer conductor has a longitudinal axis defined along a length thereof. The outer conductor at least partially surrounding the inner conductor at least partially along the length thereof. One of the inner conductor and the outer conductor is movable with respect to the other. At least one antenna of the assembly of antennas is deployable from a first state for ablating a first ablation region of tissue to a second deployable state for ablating a second ablation region of tissue. The first and second ablation tissue regions overlap to define an aggregate ablation region.

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