The TSA maintained that the backscatter machines, manufactured by Rapiscan Systems, were safe and effective.
Backscatter machines could return one day if the company develops required software, the TSA has said.
The last backscatter machines were removed about two weeks ago, a TSA spokesman said.
Currently, the TSA uses the 174 backscatter machines in 30 airports, and has another 76 units in storage.
The TSA could allow backscatter machines in the future if the company develops the required software, the TSA said.
But while manufacturers of the less-intrusive "millimeter wave" machines found ways to use ATR software, backscatter machines have not.
The backscatter machine "delivers an extremely low dose of ionizing radiation" with levels "below the acceptable limits, " the report stated.
The decision to remove the backscatter machine will make moot, at least temporarily, travelers' concerns about the health effects of the machines.
One uses "backscatter" technology to produce an X-ray image of a person.
In addition to the backscatter machines, the TSA has also deployed about 260 millimeter-wave machines which use radio waves and do not emit X-rays.
Backscatter machines use X-rays, while millimeter wave machines use radio waves.
The Z Backscatter Vans, or ZBVs, as the company calls them, send a narrow stream of X-rays off and through nearby objects and read which ones bounce back.
Rapiscan backscatter scanners use low-dose x-rays to do the same.
The TSA move came after Rapiscan, the manufacturer of the 174 so-called "backscatter" machines, acknowledged it could not meet a congressional-ordered deadline to install privacy software on the machines.
Lee of TSA emphasized that the images Coney refers to do not represent millimeter wave technology but rather "backscatter" technology, which she said TSA is not using at this time.
The TSA plans to deploy 1, 275 backscatter and millimeter-wave scanners covering more than half its security lanes by the end of 2012 and 1, 800 covering nearly all the lanes by 2014.
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But Congress voted to require all body scanners to have privacy-protecting software, and the TSA announced in February it was phasing out backscatter systems because they could not meet the new standard.
There are two types one bounces electromagnetic waves off the body to create an image like this and the other uses backscatter technology to project low level X-ray beams over the body resulting in images like this.
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Rapiscan Systems, which makes the backscatter X-ray scanner, installs one of a series of "privacy algorithms" that can dial up or down the images' resolution. (Of course, the fuzzier the result the harder it is to spot a weapon.) Similarly, millimeter scanner-maker L-3 can blur faces, chests and groins, depending on the customer's preference.
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