Current density distribution obtained by CDI. Tissues were exposed to 90 high voltage electric pulses with an amplitude of 3000 V and a duration of 100 μs at a repetition rate of 1 Hz. Pulses were delivered between two needle electrodes (marked with + and -). Current density distributions are presented as a vector field (two figures on the left; black and red arrows mark current density distributions that are lower and higher than 10 kA/m2, respectively) and as an absolute value (two figures on the right). Only current densities obtained during first two (pulse number 1 and 2) and last two pulses (pulse number 89 and 90) are presented for easier comparison.