The Homeland Security Department has completed a review of the Transportation Security Administration’s new airport scanners and says they are safe enough, according to a report the agency’s inspector general issued Tuesday.

After a review of independent studies, investigators said a traveler would need to go through 17,000 screenings in a year — equal to about 47 scans a day — in order to reach the limit of acceptable radiation dosing.

But the review did not satisfy Sen. Susan Collins of Maine, the ranking Republican on the Senate Homeland Security and Governmental Affairs Committee, who said she still wants to see an independent review by a non-government body.

“This report is not the report I requested,” she said, adding that more study still needs to be done on specific populations such as pregnant women and TSA employees. “An independent study is needed to protect the public and determine what technology is worthy of taxpayer dollars.”

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