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Electrode array for MH-NPS. Four-needle high-voltage electrodes are arranged in a 5 mm × 7 mm array with center port for an infrared laser fiber. Thermopile for surface temperature monitoring is angled toward target (A). Ethylene tetrafluoroethylene tubing sheaths high-voltage needle electrodes leaving 3 mm exposed to insert into target tumor (B). MH-NPS indicates nanosecond pulse stimulation with moderate heating.
