Delivering tumor treating fields (TTFields) to the neck

A method of planning the positioning of first and second sets of electrode elements on a person's body, the method comprising the steps of:

• obtaining a 3D model of electrical conductivity or resistivity of an anatomic volume within the person's body at a given frequency, wherein the anatomic volume is located in or near the person's neck;
• identifying a location of target tissue within the anatomic volume;
• analyzing electric fields associated with a plurality of layouts for the first and second sets of electrode elements based on the respective layouts, the 3D model of electrical conductivity or resistivity, and the identified location of the target tissue;
• and
• selecting one of the plurality of layouts based on a result of the analyzing,
• wherein the first set of electrode elements has a first centroid, and
• wherein in each of the plurality of layouts, (a) the first set of electrode elements is positioned on the person's head with the first centroid positioned on the person's head, and (b) the second set of electrode elements is positioned on the person's chest.

A method of treating a tumor or preventing metastases in or near a person's neck, the method comprising:

• affixing a first set of electrode elements to the back of the person's neck;
• affixing a second set of electrode elements having a centroid to a front of the person's upper chest with the centroid positioned on the front of the person's upper chest;
• and
• applying an alternating voltage between the first set of electrode elements and the second set of electrode elements,
• wherein the applying is performed after affixing the first and second sets of electrode elements, and
• wherein the first and second sets of electrode elements are affixed at positions such that when the alternating voltage is applied between the first set of electrode elements and the second set of electrode elements, an electric field intensity greater than 1 V/cm is produced in a majority of a region of interest that includes all portions of the person's neck that are anterior to the person's spine.