1. A method of monitoring neurostimulation leads, each having a plurality of electrodes implanted within a patient, the method comprising: providing a plurality of neurostimulation lead models, each of which includes estimated electrical parameter data corresponding to a predetermined relative position between the neurostimulation leads; transmitting electrical energy to or from the electrodes of the neurostimulation leads; measuring electrical parameter data in response to the transmitted electrical energy; comparing the measured electrical parameter data with the estimated electrical parameter data of each of the neurostimulation lead models; and determining a relative position between the neurostimulation leads based on the comparison.