Experimentation with a transcranial magnetic stimulation system for functional brain mapping - Ettinger, GJ; Leventon, ME; Grimson, WE; Kikinis, R; Gugino, L; Cote, W; Sprung, L; Aglio, L; Shenton, ME; Potts, G; Hernandez, VL; Alexander, E (Med Image Anal, 1998)