The next time you fly, your bag may undergo a computed tomography, or CT, scan.

Indianapolis International Airport is one of 15 airports using technology similar to a medical imaging scan to look inside your luggage.

Currently the Transportation Security Administration, or TSA, uses screening technology for bags that produces two-dimensional images.

CT scanning adds a dimension and allows the screeners to rotate the image 360 degrees for a more complete view of the carry-on contents. In addition, the technology, which is currently used to screen checked baggage, creates such a clear image that a computer can automatically detect explosives, including those disguised in liquids, TSA officials say.

Phoenix Sky Harbor International, JFK, Dulles and Boston Logan were among the first to test the new scanners. Travelers do not need to take out their laptops if they undergo this screening.

More:Indianapolis airport teases potential new European flights, terminal updates

More:Everyone loves the Indianapolis airport. This time, it's Travel +Leisure.

At the end of July, TSA announced that another dozen of airports, including Indianapolis, would be getting the scanner soon. Cincinnati, Chicago and ST. Louis were also on the list.

By the end of this year, the agency said, about 40 units would be at work across the country and more than 145 are expected to be in airports by the end of 2019.

"TSA is committed to getting the best technology to enhance security and improve the screening experience. Use of CT technology substantially improves TSA's threat detection capability at the checkpoint," TSA administrator David Pekoske said in a news release announcing the expansion.

Eventually, TSA hopes that new technology will allow travelers to keep both their laptops and 3-1-1 liquids packed, speeding up the screening process.

In cases where a bag might require further screening, however, TSA officers may still conduct their own search, TSA officials said.

Bizarre items:Brass knuckles, a hatchet and other dangerous things TSA has found at Indianapolis airport

Call IndyStar staff reporter Shari Rudavsky at (317) 444-6354. Follow her on Facebook and Twitter: @srudavsky.