To scan or not to scan?

That’s the choice facing U.S.-bound passengers at Pearson International ­Airport as the airport rolls out Canada’s first full-body scanner.

The high-tech scanner, which uses radio waves to peer beneath clothing to scan skin surfaces, was put into service Wednesday at Terminal One, said Mathieu Larocque, spokesman for the Canadian Air Transport Security Authority.

Passengers designated for secondary screening are offered the choice of a full-body scan or a pat-down.

Passengers headed into the security zone on Thursday said they’d prefer a scan over a hand search by more than a 10-1 margin.

“It’s invasive when somebody touches me,” said Toronto resident Olena Kashuba, 30, on her way to Chicago. She said she didn’t fear the scans or the operators who viewed the images.

“They see like, what, 10,000 a day? I think they’re going to be bored with all those bodies. I like my body, so I don’t mind,” she said. “But touching? I don’t like.”

For Mike Shumate, on his way to Texas, it was all about convenience.

“I guess I’d choose screening, whichever is quicker, the shortest line,” he said. “At the end of the day, if it keeps us safe, I’m all for it.”

But 24-year-old Ashley from Barrie, who was flying to Florida, said a hand search was far preferable to a scan.

“I don’t like the idea of a body scan,” she said. “I guess it’s more invasive when they get to see everything.”

CATSA is rolling out 11 of the millimeter-wave machines at major airports “as we speak,” Larocque explained, although Pearson has the first.

He couldn’t specify when others would arrive at airports in Montreal, Vancouver, Calgary, Ottawa, Halifax and Winnipeg.