More powerful tracers could harm the cells or the patients with excess radiation, they fear.

At least 667 workers, emergency responders, and nearby residents were exposed to excess radiation as a result of the accident.

The FDA has also received reports of possible excess radiation from other states.

Facilities assess whether patients who underwent CT perfusion scans received excess radiation.

To protect patients from being exposed to excess radiation he established new safety and reporting standards at California medical facilities.

Dr. Scott said in the memorandum that the excess radiation did not pose a threat to workers.

The excess radiation has created a different incarnation of the Hulk, one in which Banner has complete control.

Therefore, it seems likely that Jupiter has powerful internal sources of heat, and to account for the excess radiation these would make the interior hot.

It isn't excess radiation they're worried about.

"Where does the excess radiation come from?"