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The AC magnetic field distribution of the applicator coil for all 3 directions and the absolute field approximately 4 mm above the coil. Heat maps summarize the distribution of the magnetic flux density: (A) Bx component, (B) By component, (C) Bz component, and (D) absolute |B|. The measurement was taken with the recalibrated 3 axes PNI RM3100 sensor for a constant current (I = 0.1 A) after subtracting the local earth magnetic field (I = 0 A).
