No cost-benefit analysis was conducted before the government’s decision to impose body scanning on international passengers departing the country, the government has revealed.

On Sunday Transport Minister Anthony Albanese announced that a $28 million program to install scanners at international airports would proceed after "a successful trial" at Sydney and Melbourne airports. Passengers selected for scanning who refused would not be permitted to fly, the same policy as applies in Britain (in the US, passengers who refuse have the option of a highly invasive pat-down search).