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352 points keithly | 1 comments | | HN request time: 0.281s | source
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agentultra ◴[] No.41848509[source]
I am all for evidence-based medicine making its way into dentristry if it's lacking... but if you're someone who is worried about cumulative exposure to X-ray length radiation, what is the dosage? And can we compare it relative to to say, millimeter scanners at the airport or a domestic flight?

I was under the impression that the digital machines they use these days are:

1. localised 2. very, very low dose

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1. zamadatix ◴[] No.41849604[source]
As an important distinction the current millimeter scanners at the airport are completely uncomparable. They use non-ionizing radiation similar to Wi-Fi. There used to be backscatter x-ray scanners (ionizing radiation) but these were decommissioned in the EU/US in 2012/2013 due to public concern even though the levels were low as well.

The importance of the distinction is a lifetime of non-ionizing radiation is not known to cause any adverse effects while any instance of ionizing radiation is known to damage cells, even when it's a low amount in a controlled area. The debate people have with the former is whether or not it might even causes a problem in the first place while the debate with the later is where the best balance on the damages vs advantages is.