Fig. 12.19. The lead field current density distribution of a bipolar lead in a cylindrically symmetric volume conductor realized with two coaxial single-coil magnetometers with 10 mm coil radius. The distance between the coils is 340 mm. The dashed lines are the isosensitivity lines, joining the points where the lead field current density is 500 and 1000 pA/m2, respectively, as indicated with the numbers in italics.