Do airport body-scans have radiation risk?

Some individuals will apparently get cancer from these scans, but the risk of any individual getting cancer is very small.

Some scientists and two major airline pilots unions contend not enough is known about the effects of the small doses of X-ray radiation emitted by one of the two types of airport scanning machines.
The Transportation Security Administration's advanced imaging technology machines use two separate means of creating images of passengers -- backscatter X-ray technology and millimeter-wave technology.
At the end of October, 189 backscatter units and 152 millimeter-wave machines were in use in more than 65 airports. The total number of imaging machines is expected to near 1,000 by the end of 2011, according to the TSA. . . .
"If you think of the entire population of, shall we say a billion people per year going through these scanners, it's very likely that some number of those will develop cancer from the radiation from these scanners," Brenner [director of the Center for Radiological Research at Columbia University and a professor of radiation biophysics] said.
Skin cancer would likely be the primary concern, he said. Each time the same person receives a backscatter scan, the small risk associated with the low dose of radiation is multiplied by the number of exposures.
Brenner said the risk to an individual is "very small indeed" for a single scan. He said he is most concerned about frequent fliers, pilots and young people, because children are more sensitive to radiation.. . . .

See also this:

Some US scientists warned Friday that the full-body, graphic-image X-ray scanners now being used to screen passengers and airline crews at airports around the country may be unsafe.

They say the risk is minimal, but statistically someone is going to get skin cancer from these X-rays," Dr Michael Love, who runs an X-ray lab at the department of biophysics and biophysical chemistry at Johns Hopkins University school of medicine, told AFP.

"No exposure to X-ray is considered beneficial. We know X-rays are hazardous but we have a situation at the airports where people are so eager to fly that they will risk their lives in this manner," he said.

The possible health dangers posed by the scanners add to passengers' and airline crews' concerns about the devices, which have been dubbed "naked" scanners because of the graphic image they give of a person's body, genitalia and all. . . .

And also this discussion.

Stepped-up security screening at airports in the wake of foiled terrorism plots has provoked an outcry from airline pilots and travelers, including parents of children who say they are too intrusive.

With the busiest holiday travel season nearing, fliers face long security lines and new rigorous patdown checks begun in recent weeks aimed at discovering hidden explosives. As a result, some travelers are questioning whether to fly at all. . . .