As of June 1, 2013, all radiation producing x- ray “backscatter” machines have been removed from U.S. airports.
At this time only millimeter wave machines are in use. These devices use radio waves and produce no potentially harmful radiation.
Good news for the frequent traveler.- Terry Hollenbeck, M.D., is an urgent-care physician at Palo Alto Medical Foundation Santa Cruz in Scotts Valley. Readers can view his previous columns on his website, valleydoctor.wordpress.com, or e-mail him at firstname.lastname@example.org.