The U.S. Food and Drug Administration announced last week that it was bulking up its approval process for new radiotherapy equipment in an effort to cut back on radiation overdoses. The former process of allowing equipment to be approved by outside, third-party reviewers will be eliminated, and the agency will start more aggressively reviewing the devices. As part of their analysis, the F.D.A. found that many of the device problems “could be mitigated by the incorporation of additional safeguards.”