"Cell Phones Affect Brain Activity." That headline has appeared all over the world since Nora Volkow published a PET scan of a brain lit up by a cell phone last month. Her colorful graphics, published in the high impact Journal of the American Medical Association (JAMA), guaranteed Volkow a large and attentive audience. But all the hoopla shouldn't obscure the fact that for more than a decade many others, notably Peter Achermann's group at the University of Zurich, have shown similar types of radiation-induced changes in the brain as well as much more.