Scientists Question Safety of New Airport Scanners
An anonymous reader sends this quote from a story at NPR about the accelerated deployment of new scanning machines at airports:
"Fifty-two of these state-of-the-art machines are already scanning passengers at 23 US airports. By the end of 2011, there will be 1,000 machines and two out of every three passengers will be asked to step into one of the new machines for a six-second head-to-toe scan before boarding. About half of these machines will be so-called X-ray back-scatter scanners. They use low-energy X-rays to peer beneath passengers' clothing. That has some scientists worried. ... The San Francisco group thinks both the machine's manufacturer, Rapiscan, and government officials have miscalculated the dose that the X-ray scanners deliver to the skin — where nearly all the radiation is concentrated. The stated dose — about .02 microsieverts, a medical unit of radiation — is averaged over the whole body, members of the UCSF group said in interviews. But they maintain that if the dose is calculated as what gets deposited in the skin, the number would be higher, though how much higher is unclear."
People getting in fights over their cock size.
didnt these types of scanners get covered a few months ago with negative side effects from a scientific study proclaiming evidence the radiation can unzip DNA?
how about this for airport security: stop blowing up brown people and start working with countries other than china, canada, and mexico to ensure we're better global citizens...
Good people go to bed earlier.
To never use commercial airflight again.
I judt got a nre Kinesis keybiartf so please excusr ant egregiou typos.
Need a vascectomy? Fly the friendly skies instead! The more miles you log, the fewer kids you'll spawn!
I gave up religion for Lent.
Regardless of the health issues, why should I be electronically strip-searched when the next terrorist is going to shove explosives up his ass and remove/detonate them during flight?
What invasion of privacy is going to happen after that event?
And the worms ate into his brain.
There's already been studies looking at changes in gene expression following millimeter-wave irradiation of skin: http://www.ncbi.nlm.nih.gov/pubmed/18302488
Overall, given the reviews of the literature it's still unclear whether there's a potential for long-term health damage.
However, even if there was, I doubt anyone will care. The security theater must be kept up, even if it means that people would be harmed by repeated exposure.
"Sir, we will protect you from yourself, even if it kills you".
I don't honestly care whether there's a real medical issue here. I don't care if it takes Fox News-style "gotcha" tactics to make the hysterical cries of "THINK OF THE CHILDREN" echo up and down the corridors of the powerful.
Anything that kills this program needs to be seized upon, hyped, spun into something it's probably truthfully not - the lies and paranoia that have been eating away at us like a cancer need to be repurposed toward actually helping us.
--Ryv
Rapisca. Rape is Ca? Rape is Canadian? WTF? Is this some weird product from Canada, like the Penis Mightier?
(Well does it work? C'mon man! Tell me!)
Sent from your iPad.
As someone who has done a fair share of work in airports (digital signage) and has been badged in a couple of term, I can say this from observation and from talking to people in the airports and the TSA, the issue is not the passengers, it's the workers. The passengers are checked to ridiculous measures, but if you work at an airport your protocols are entirely different. All the tarmac entrances and any "employee only" entrance isn't guarded by the TSA, but rather independent security companies hired by the airports themselves, so every airports strictness at these points are anywhere from stricter or far more lax, especially if you're a regular employee that they recognize. I have had to throw gear into the back of an electricians truck many many a time and driven it onto the tarmac without them opening or even swabbing the boxes. At that point I am less then 30ft away from a 767.
All this extra effort at the checkpoints is to keep up what most people here already know what it is. The illusion of absolute safety in a system where it can never be guaranteed 100%.
"Why Does Liberal Academia Hate Security?"
but i read somewhere that the simple act of flying is equivalent to getting an x-ray because you're so high in the atmosphere
i also read that living in denver for a year is equivalent to getting an xray (as compared to living in say miami: at sea level, rather than a mile up)
not that i'm justifying these scanners, but if you're worried about extra unnecessary irradiation, then don't fly (or live in the mountains)
its too much of a hassle anyways, even without the scanners, flying sucks
intellectual property law is philosophically incoherent. it is your moral duty to ignore it or sabotage it
This or full body cavity search Take your pick!
Cosmic rays at 30,000 feet, plus other ionizing radiation is significantly higher than at ground level. 4 hours on a plane is something like a month's worth of ground-level exposure. Yet people still fly. I don't think this will have any impact on air travel.
Backscatter x ray is *not* the same as millimeter wave. Millimeter wave is about of the order of magnitude of milli-electron volt and not an ionizing radiation energy. OTOH x ray is at least on the order of magnitude from 100 electron volt and is definitively an ionizing radiation. There is a reason they were measuring the amount of radiation absorbed in millisievert, whereas for millimeter wave scanner there is no concern (around near infrared).
C. Sagan : A demon haunted world:
http://www.amazon.com/gp/product/0345409469/
visit randi.org
Who are going to involuntarily contract google-itis from this. :'-(
Once you start despising the jerks, you become one.
Who here isn't willing to sacrifice a few years off their lives to protect our children from people with a bomb laden (please!) SUV in their underwear?
“He’s not deformed, he’s just drunk!”
Every time your 5-year-old child steps through, it's just like you made them smoke a cigarette. Would you make your 5-year-old child smoke a cigarette?
Once you start despising the jerks, you become one.
The company name is Rapiscan.
Can someone tell me about the scanners for containers in ports? My neighbor is a trucker, and he asked me about that. Apparently, as the driver, he has to go through the scanner himself pretty frequently (it's the port of Oakland in California if that makes a difference).
A couple of orders of magnitude more for the average flight. That would be whole-body, not skin.
I remember writing mine, by the end I was very brain adled. But I look back at that time with fondness :). Afterward it can get even worst trying to find a post doc :p.
C. Sagan : A demon haunted world:
http://www.amazon.com/gp/product/0345409469/
visit randi.org
Ok, who smoked their dope and decided to mod this Insightful?
Let's look at the alternatives:
a) Non-commercial flight. You have two options: rent or buy a private airplane or attempt the do-it-yourself-armchair-and-helium-balloon idea. One's very expensive, eliminating it for the majority of the population. The other will assure that you'll never fly again, because you'll be dead.
b) Use an alternate method of transportation. By land, take a train (because if you can drive it, you wouldn't fly it). For trans-oceanic flight, take a boat. Both options are slow and expensive when compared to an aircraft. And if you know your history, one option involves the risk of developing scurvy.
Look, nobody likes being thought of as a potential terrorist. But at least you don't need to bend over for a special exam every time you show up at the airport.
Clearly the TSA values the planes higher than the commodity of We The Travelers. The planes cost more than the people, thus the people get shat upon.
Comment removed based on user account deletion
I DO NOT have a security clearance. But I have a card from an airline (I am a simple check-in peon...). One time I went in the back of a big itnernational hub airport to find a better way with bicycle to go to work. At some point I found myself on the FRAKING TARMAC and nobody had stopped me. I got angsty that some camera sees me and I lose my job so I went away quickly. But yeah, the back yard of many airport is not much protected. Those security ? They are not always for show, but mostly they stop dumb people. The real reason no terrorist try that shit anymore is that it ain't worth the effort and planning.
If you don't mind to die, then what's to stop you from hiding a few sticks of C4 (with ceramic shrapnel, of course) inside your body by, you know, having a surgeon sew it in? Stick a simple fuse triggered by a Hall sensor into it, and carry an inconspicuous looking magnet with you onboard to trip the fuse.
I said it before and I'll say it again -- any determined engineer will find a way to completely bypass these "security" measures without even straining his/her brain too much.
The stated dose — about .02 microsieverts, a medical unit of radiation — is averaged over the whole body, members of the UCSF group said in interviews. But they maintain that if the dose is calculated as what gets deposited in the skin, the number would be higher, though how much higher is unclear."
Well, a quick back-of-the-envelope calculation says it could be a lot. Suppose you model a person as a cylinder 2 meters high by 1/2 meter across. The volume is 0.4 meters^3, the surface area is 3 meters^2. If the skin is 0.1 mm thick, then the volume of the skin is only 0.0003 meters^3, a factor of > 1000 smaller. So a dose of 0.02 microsieverts for the whole body would be 25 microsieverts for the skin.
If you read the original article, a chest X ray is about 100 microsieverts, but of course that is absorbed in the body, not the skin. Radiation therapy causes skin "burns", but I couldn't find in a quick search the level of radiation absorbed by the skin to make that happen. However, if this is a problem as indicated, then flying one round trip per week (100 flights/year) would mean an exposure of order 2500 microsieverts, or 25 chest X rays, a level I don't think Doctors would be comfortable with.
To put the dose in perspective, the ICRP 60 recommended dose limit to the whole body for the public is 1000 microsieverts/year. A 0.02 microsievert effective dose to the whole body is nothing. You would have to fly 50000 times to exceed this limit.
Saw this today. What sort of abnormality did this detect and how far did the x-ray penetrate?
(AP) LAGOS, Nigeria -- Nigeria's drug enforcement agency says it has arrested a politician who allegedly swallowed 2 kilograms (nearly 4.5 pounds) of cocaine to fund his election campaign.
The National Drug Law Enforcement Agency said Monday it arrested 52-year-old Eme Zuru Ayortor at Lagos' Murtala Mohammed International Airport. [b]The agency says the pharmacist-turned-politician was trying to board a flight to Germany when a scanning machine detected an abnormality in his stomach.[/b]
Agents say they found 100 individually wrapped packages of cocaine inside his body. The agency says the politician claimed his failed 2007 run for the Edo state House of Assembly ruined him financially and smuggling drugs was the only way he could fund his 2011 election bid. He has yet to be charged.
Anybody know if there's a deployment schedule for these things? Airport names and dates of deployment would be nice. That'll help me figure out where I definitely won't be going, and when.
I don't know about you, but my servers run on the power of cotton candy and happy thoughts. -Anonymous Coward
...none of the scientists in the article asserted any significant concern about the relative safety of the device.
Radiation safety issue? Gimme a break.
Nice headline; no story. You must be a student of the KDawson school of editorial?
Radiation! Yay! This century has been *AWESOME* so far!
I'd rather just get naked than get bombarded with carcinogenic radiation.
So my options are a scan with a machine that has unknown health effects OR having a strange man give me an airport massage?
I happen to be a bisexual and I have an authority fetish, so I think that I'm rather priviledged here.
Don't get rid of them yet, I haven't had time to try any of my ideas out.
* Using metallic paint to draw a glock 9mm on my skin as if it were in a shoulder holster.
* Drawing a massive, 1 - 2 foot long, penis down my thigh in metallic paint.
* (my favorite) Shaving my head bald, drawing a full Terminator style robot endoskeleton on my back, in metallic paint, including the skull on the back of my head and letting my hair grow back enough to cover it before going to the airport.
Rules of Conduct:
#1 - The DM is always right.
#2 - If the DM is wrong, see rule #1
Just when I was starting to get my sperm count going up after starting a better diet and exercise program, now they're going to go ahead and kill off some more of the little fellers. Greyhound here I come!
If these are the same scientists that discovered "global warming" then I figure these new airport scanners, far from being dangerous, may actually cure all sorts of diseases.
The 0.2 micro Sievert are body-equivalent, not what you get on your skin! The exposure just for your skin could be a 100-times higher. Nobody knows, the specs aren't exactly public.
For example, for a chest Xray they tell you that it is 20 micro Sievert. Again Body-equivalent, of course! Meaning, it increases your cancer risk like 20 micro Sievert would for the whole body. But since I don't get lung cancer in my toe, I don't care much about body equivalent. Just looking at lung cancer, chances for lung cancer are probably 10 times of what 20 micro Sievert would give you.
So, how did they adjust their calculations for the airport scanners? Is the body equivalent they tell us a 1/10 or a 1/100 of the dose to the skin?
The backscatter Xray in airport scanners will cause skin cancer. What isn't known is the yearly rate. 2 deaths per year or 200? Would be nice to know, wouldn't it?
It's odd that almost all the posts on this story sidestep the issue that the article actually raises, which is that if this kind of radiation is almost entirely absorbed by the skin (which has been a selling point), it is misleading to also treat it as though the dosage were spread uniformly through the recipient's body. To get a better idea of the health effects of the scans, we need to determine the fraction captured in each different layer of the human skin and consider what is known about the effects of dosages to those layers. If you want to convince us of the safety of these scans, offer an argument that the stratum corneum absorbs the bulk of it, rather than posting yet another beside-the-point comparision of the expected total body dose against that received from other kinds of ionizing radiation exposures.
Those who would give up essential liberty to purchase a little temporary safety, deserve neither liberty nor safety.
A good example of this was at an airport in Australia where thieves in overalls made multiple trips into a secure area to steal a rack load of computers that contained some sort of security database. The looked as if they belonged and they were not taking any strange or dangerous things into the airport. Of course when it was reported the initial press release stated they had a "middle eastern appearance" but it turned out that was a lie added in to try to make it look like airport security was a victim of some vast terrorist conspiracy instead of a couple of local thieves.
Those who desire to give up freedom in order to gain security will not have, nor do they deserve, either one. /Here's hoping the TSA guys get testicle cancer from it.
I am the unwilling control for my Origin.
It's not just a joke - a couple of TSA employees just got in the news for getting into a fight because one of them said the naked-passenger-scanner showed that the other guy had a small penis.
Bill Stewart
New Fast-Compression-only CPR http://preview.tinyurl.com/dy575ks
In some of the Hawaii airports, the small inter-island flights are at the commuter terminal, which doesn't go through TSA inspection theater line. They still want to see your papers, and the other privacy invasion is that they need your weight, which is going to determine where you sit on the plane (I end up in back with the Samoans :-), but basically the security rules figure that crashing a 10-seater Cessna into a building isn't enough Mass Destruction to be a National Security Threat. General Aviation seems to work about the same way - at least at SFO, you can just drive up to the executive terminal and park. If you wanted to get onto the runway, a pair of bolt cutters would get you through any security.
Bill Stewart
New Fast-Compression-only CPR http://preview.tinyurl.com/dy575ks
The greatest enemy of the United States of America!
Press badge.
One of my cousins works in DC as a political correspondent; she says it's still incredibly easy not only to get access to the tarmac, but to baggage areas as well, if you push hard enough. A few years after 9/11 she was part of a group that walked thru security and placed a stuffed animal into a bag on the baggage line after it'd cleared security. Wish I still had the link, the article was hilarious. Anyone remember it?
SB
It's old. The more humans I meet, the more I like my cats. At least they are honest.
http://xkcd.com/651/
AP: Experts Disagree.
(was listening to NPR at work and heard that one as well, it was the best laugh I've had in weeks, thanks for the reminder)
SB
It's old. The more humans I meet, the more I like my cats. At least they are honest.
Strip me roughly.
.
Take all my clothes off.
.
Give me an anal cavity search with the elbow length rubber glove.
.
Yesssssss - And to protect public safety - I have even bought my own rubber glove....
.
Praise Jesus.
LETTER OF CONCERN
We are writing to call your attention to serious concerns about the potential health risks of the recently adopted whole body backscatter X-ray airport security scanners. This is an urgent situation as these X-ray scanners are rapidly being implemented as a primary screening step for all air travel passengers.
Our overriding concern is the extent to which the safety of this scanning device has been adequately demonstrated. This can only be determined by a meeting of an impartial panel of experts that would include medical physicists and radiation biologists at which all of the available relevant data is reviewed.
An important consideration is that a large fraction of the population will be subject to the new X-ray scanners and be at potential risk, as discussed below. This raises a number of ‘red flags’. Can we have an urgent second independent evaluation?
The Red Flags
The physics of these X-rays is very telling: the X-rays are Compton-Scattering off outer molecule bonding electrons and thus inelastic (likely breaking bonds). Unlike other scanners, these new devices operate at relatively low beam energies (28keV). The majority of their energy is delivered to the skin and the underlying tissue. Thus, while the dose would be safe if it were distributed throughout the volume of the entire body, the dose to the skin may be dangerously high.
The X-ray dose from these devices has often been compared in the media to the cosmic ray exposure inherent to airplane travel or that of a chest X-ray. However, this comparison is very misleading: both the air travel cosmic ray exposure and chest X- rays have much higher X-ray energies and the health consequences are appropriately understood in terms of the whole body volume dose. In contrast, these new airport scanners are largely depositing their energy into the skin and immediately adjacent tissue, and since this is such a small fraction of body weight/vol, possibly by one to two orders of magnitude, the real dose to the skin is now high.
In addition, it appears that real independent safety data do not exist. A search, ultimately finding top FDA radiation physics staff, suggests that the relevant radiation quantity, the Flux [photons per unit area and time (because this is a scanning device)] has not been characterized. Instead an indirect test (Air Kerma) was made that emphasized the whole body exposure value, and thus it appears that the danger is low when compared to cosmic rays during airplane travel and a chest X-ray dose.
In summary, if the key data (flux-integrated photons per unit values) were available, it would be straightforward to accurately model the dose being deposited in the skin and adjacent tissues using available computer codes, which would resolve the potential concerns over radiation damage.
Our colleagues at UCSF, dermatologists and cancer experts, raise specific important concerns:
A) The large population of older travelers, >65 years of age, is particularly at risk from the mutagenic effects of the X-rays based on the known biology of melanocyte aging.
B) A fraction of the female population is especially sensitive to mutagenesis- provoking radiation leading to breast cancer. Notably, because these women, who have defects in DNA repair mechanisms, are particularly prone to cancer, X-ray mammograms are not performed on them. The dose to breast tissue beneath the skin represents a similar risk.
C) Blood (white blood cells) perfusing the skin is also at risk.
D) The population of immunocompromised individuals--HIV and cancer patients (see above) is likely to be at risk for cancer induction by the high skin dose.
E) The risk of radiation emission to children and adolescents does not appear to have been fully evaluated.
F) The policy towards pregnant women needs to be defined once the theoretical risks to the fetus are determined.
G) Because of the proximity of the testicles to skin, this tissue is at risk for sperm mutagenesis.
H) Have the effects
Would SPF 50 help?
The entire threat of airplane terrorism cannot justify such a step
Agree, but for a different reason.
Guys, the airplane threat is over. Way too much coverage. Way too much coverage.
The next terrorist act will be neither aircraft hijackings, anthrax in envelopes, or blowing up an ancient stone Buddha. It will be something entirely else, perpetrated while we have our attention elsewhere.
Like any good hunter, we need to focus on where they'll be, not where they've been. Look around you - what civil infrastructure is vulnerable? All of it? Do we need to fence the stuff off or just change our patrol patterns? Software behind cameras?
Think ahead, please. If it's a problem, let's work the problem.
Do not mock my vision of impractical footwear
I need my pens! I have to have something to divert me when we're delayed an hour on take-off, my laptop battery flat-lines, my book's in the bag I had to check because we've been stripped down to carry-on, and I've read the in-flight magazine three times and am ready to convert to Marxism.
Almost all the radiation ends up in the skin. Other radiation in total may be higher for a flight, but it is of differing kinds and is absorbed by other parts of body.
I would let them scan me because I hardly ever fly, but I'd be concerned if I had to walk through one of these every few days.
...
Now I have to wear lead underpants in addition to my tinfoil-hat.
.sig? Get your own damn
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