Last year he bought a radiation center in Santa Monica, Calif. run by Michael Steinberg, a member of an influential trade group that advises Medicare on how to set rates for the latest technologies.

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West Virginia-based Schiffler Cancer Center radiation oncologist Gregory Merrick says it will revolutionize how radio seed therapy is done.

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"Radiation is now as good as surgery, and that wasn't the case 15 years ago, " says Daniel Shasha, a radiation oncologist at Beth Israel Medical Center in New York.

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"In cancer, we create free radical damage to tumor cells with treatment, and we want that, but antioxidants quench this damage, " explains Dr. Brian Lawenda, the clinical director of radiation oncology at the Naval Medical Center, in San Diego, California.

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"Probably the group of centers which were studied in this paper are more sophisticated and more aware of radiation-reduction methods than your typical center that is performing cardiac CT angiography, " he says.

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"Partial-breast irradiation is a very promising approach, but there's a lot we have to learn, " says Lori Pierce, professor of radiation oncology at University of Michigan Comprehensive Cancer Center.

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Shielding that would completely block those rays would be "meters thick" and too heavy to be used aboard a spacecraft, said Eddie Semones, a radiation health expert at NASA's Johnson Space Flight Center.

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The responsible section of the FDA, the Center for Devices and Radiological Health, routinely monitors the safety of a vast array of radiation-emitting products.

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"We did find that women who lived in the South and areas of high solar radiation have reduced risk of breast cancer, " said John, who is based at the Northern California Cancer Center in Union City, California.

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