Patent ID: 6849040

Claim:
A method for determining the effect of magnetic stimulation on the brain of a human subject, the method comprising the steps: applying a sequence of stimulus current pulses to a magnetic stimulation coil to induce an electric field in the brain, for each applied stimulus pulse, separately determining the position and alignment of the magnetic stimulation coil in three dimensions relative to the subject's head, determining coordinate data for the brain substantially unambiguously in the same coordinate system with the magnetic stimulation coil, calculating the intensity of the electric field induced at a desired point in the brain, or the electric current generated at said desired point, for each stimulus pulse applied to the magnetic stimulation coil, and calculating the cumulative dose of electric field induced at said desired point in the brain by summing the electric field intensity induced by the individual stimulus pulses over the sequence of pulses, or calculating the cumulative dose of electric current generated at said desired point in the brain by summing the electric currents generated by the individual stimulus pulses over the sequence of pulses.