Multi Channel Device for Directional Shaping of Electric Fields e.g., Tumor Treating Fields (TTFields)

The paths that alternating electric fields take through a body part can be controlled by providing at least eight electrically isolated signal generators, each of which is configured to apply electrical signals between a respective electrode element on one side of the target region and a respective electrode element on the opposite side of the target region. This replaces the prior art's single wide-cross-section electric field with eight independently controllable electric fields, each of which has a relatively narrow cross-section. Using these relatively narrow cross-section fields, either alone or in combination, can improve aiming of the electric field, which can in turn increase the field strength in the target region. Optionally, activation of these relatively narrow cross-section fields can be shifted in time to achieve steering of the overall electric field.