A startled security worker noticed the shape of a child on the carry-on baggage screening monitor and immediately pulled him out, the Los Angeles Times reported for a story in Wednesday's editions.
The infant was taken to a local hospital, where doctors determined he did not receive a dangerous dose of radiation.
"This was an innocent mistake by an obviously inexperienced traveler," said Paul Haney, deputy executive director of airports and security for the city's airport agency.
The incident happened early Saturday, airport officials said, reports AP.
Haney said in 1988, an infant in a car seat went through an X-ray machine at the Los Angeles airport.
The Investigative Committee of the Russian Federation put the head of the contractor company of Russia's space corporation Roskosmos, Sergei Slastikhin, on international wanted list
"Washington operators of the sanctions machine ought to get acquainted with the history of Russia, to stop the unnecessary fussing," spokesperson for the Foreign Ministry said