"More doctors are turning to repetitive transcranial magnetic stimulation (rTMS) of their patient's brains, but fears of possible seizures may be limiting its growth as a therapeutic tool. ... Treatment of severe depression with magnetic stimulation is moving beyond large mental health centers and into private practices nationwide, following more than two decades of research on the treatment. Yet even as concern about its efficacy fades, one potential side effect—seizures—continues to shadow the technology. Called repetitive transcranial magnetic stimulation (rTMS), the noninvasive technique uses electromagnets to create localized electrical currents in the brain."