BURBANK - The U.S. Food and Drug Administration has widened its investigation into radiation overdoses that patients have received from a type of brain scan, suggesting the problem may be nationwide, it was reported Tuesday. The agency says it is looking into possible overdoses at Providence St. Joseph Medical Center in Burbank and a hospital in Alabama, the Los Angeles Times reported. Providence St. Joseph is now the third hospital in Los Angeles County under investigation for problems with CT brain perfusion scans, a procedure used most often to diagnose strokes. Unlike the other cases, which involved scanners made by...