The idea is that matter sucked into the black hole's crushing gravitational field gives off light and other radiation as it is heated to millions of degrees. (sciencemag.org)
Other radiation treatments that require targeting the tumor from an external source, which exposes healthy tissues and limits how high a dose can be safely delivered. (isoray.com)
There's a conference tomorrow in New York that will focus on preparedness for nuclear disasters and other radiation emergencies. (wamc.org)