NPR reports that TSA Administrator John Pistole, made the announcement Thursday in a letter sent to the House Homeland Security Committee.
The letter reportedly stated that as of May 16, all airport scanners had been equipped with a new software that would only show generic images of the person being searched.
"As of May 16, 2013, all [Advanced Imaging Technology scanners] are equipped with ATR capability," said the letter according to The Hill. "Additionally, TSA's procurement of next generation AIT requires ATR capability."
According to NBC, while using the new software, "a colored box pops up if the full-body scanner detects a potentially forbidden item."