Apparatuses, methods, and systems for treating spinal tumors with tumor treating fields

A system to apply tumor treating fields to a subject, the system comprising:

• a first transducer adapted to be located at a first location of the subject's body;
• a second transducer adapted to be located at a second location of the subject's body;
• a third transducer adapted to be located at a third location of the subject's body;
• a fourth transducer adapted to be located at a fourth location of the subject's body;
• an alternating current (AC) voltage generator adapted to be coupled to the first, second, third, and fourth transducers and capable of providing first, second, third, and fourth voltages respectively to the first, second, third, and fourth transducers;
• and
• a controller coupled to the AC voltage generator, the controller comprising one or more processors and memory accessible by the one or more processors, the memory storing instructions that when executed by the one or more processors, cause the controller to:
• instruct the AC voltage generator to generate the first, second, third, and fourth voltages to alternately induce a first electric field in the subject between the first and second transducers and a second electric field in the subject between the third and fourth transducers, wherein the alternating first and second electric fields are focused on a spinal area of the subject.

A computer-implemented method to determine placement of transducers on a subject for inducing tumor treating fields, the computer comprising one or more processors and memory accessible by the one or more processors, the memory storing instructions that when executed by the one or more processors cause the computer to perform the method, the method comprising:

• obtaining a model of electrical conductivity in a portion of the subject, wherein the portion of the subject includes an implant comprised of a non-conductive material;
• selecting a plurality of pairs of locations on the subject, each pair of locations having a first location to locate a first transducer and a second location to locate a second transducer;
• determining, by the one or more processors and based on the model of electrical conductivity, for each location in the plurality of pairs of locations on the subject, a dosage of electric fields delivered to a spinal area of the subject;
• selecting one or more recommended pairs of first locations and second locations based at least on the model of electrical conductivity and the determined dosages of electric fields delivered to the spinal area of the subject;
• and
• outputting the one or more recommended pairs of first locations and second locations.