No one wants to be blown up. I wish they would scan all the cargo, as it seems to me that there is real risk there. Not that people boarding aren't a risk, but are these scanners really effective in stopping someone intent to harm us? Or is it one more thing for the terrorists to find a work-around?
These comments concerned me enough to say no to these machines, not until their safety has been through a published and independent review.
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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.
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In addition, it appears that real independent safety data do not exist.
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Because this device can scan a human in a few seconds, the X-ray beam is very intense. Any glitch in power at any point in the hardware (or more importantly in software) that stops the device could cause an intense radiation dose to a single spot on the skin. Who will oversee problems with overall dose after repair or software problems?
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If you've never had cancer, you may not be sensitive to these issues. Recent studies have shown that hospital scanning machines are not properly checked and adjusted for the minimal radiation exposure, and some have been found to give more radiation than is approved.
My oncologist tells me avoid hospital scans like PET and CAT unless it's a medical necessity. Too much radiation exposure. If our hospitals can't assure quality, what can we expect from TSA?
"If they're safe enough..." seems to be the consensus.
The problem is, we just don't know.