A woman mistakenly put her one-month-old grandson through an X-ray machine at Los Angeles International Airport, authorities said.

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.

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 traveller," said Paul Haney, deputy executive director of airports and security for the city's airport agency.