Applying Tumor Treating Fields (TTFields) to a Body Part in at Least Three Different Directions Using Five Arrays of Electrode Elements

Due to the directional nature of tumor treating fields (TTFields), increasing the number of directions at which TTFields are applied can increase the efficacy and volume of the TTFields treatment. The approaches described herein rely on five sets of electrode elements positioned on the subject's body to induce TTFields in three or more directions. The first, second, third, and fourth sets are positioned on the anterior, posterior, right, and left portions of the subject's body, respectively. And the fifth set is positioned on a different posterior location. Treatment proceeds by applying alternating voltages between (a) the anterior set and the posterior set; (b) the left set and the right set; and (c) the fifth set and at least one of the anterior, left, and right sets during successive time slots. This approach can increase the volume that is covered by TTFields and also provide thermal management benefits.