By Steve Sternberg Overuse of diagnostic CT scans may cause as many as 3 million excess cancers in the USA over the next two to three decades, doctors report today.

NEW YORK _ Doctors may be overusing CT scans, the popular diagnostic tool that exposes patients to far more radiation than conventional X-rays, scientists in Manhattan report Thursday.

By Weeks, Katie UC San Diego has named a replacement for Ed Holmes, former vice chancellor for health sciences and dean of the School of Medicine.

By Steve Gorman LOS ANGELES (Reuters) - A breakthrough in television advertising debuted without fanfare last spring as a brand-name box of crackers appeared on the CBS sitcom "Yes, Dear" for about 20 seconds, seen but hardly noticed by millions of viewers.

Blending brand names and products into television shows, as opposed to traditional ads that run during commercial breaks, has gained greater currency in recent years as the industry faces the rising popularity of TiVo and other devices that let viewers skip commercials.