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.
World's most powerful nuclear submarines, Arkhangelsk and Severstal, are to be dismantled after 2020 - their further exploitation is unprofitable
The United States' Head of Diplomacy, or Secretary of State, is an anachronistic, incompetent, meddling, intrusive, insolent and arrogant, rude individual, a brash, foul-mouthed upstart, a conceited, self-important guttersnipe and an insult to the international community, as fit for the job as a pedophile janitor in a grade school.