Re:When X-Rays were used at the Shoe Store
by TheOtherHobbes on Tuesday November 03, 2020 @09:31AM
(#24979935)
Modern dental x-rays are basically negligible for most patients, although not for dentists who do them daily, even though they're well away from the beam - which is why they have to hide when they take them.
Less negligible are CT scans, which can expose you to multiples of the average annual background dose in a few minutes.
That's still relatively low level exposure. But there isn't really a safe minimum exposure level, and it's certainly not something you'd want to have regularly.
Re:When X-Rays were used at the Shoe Store
by copperx on Tuesday November 03, 2020 @11:38AM
(#24981199)
Aren't CT scans equivalent to about 3,000 chest X-Rays? It sounds pretty bad if you're young.
Re:When X-Rays were used at the Shoe Store
by Teknoman117 on Tuesday November 03, 2020 @01:12PM
(#24982256)
Not quite that bad. These days a chest CT scan (~7 mSv) is worth about 70 chest x-rays (0.1 mSv).
That's 2 years (CT) and 10 days (x-ray) of exposure to sea level background radiation respectively.
Re:When X-Rays were used at the Shoe Store
by adenner on Tuesday November 03, 2020 @10:44AM
(#24980645)
With some hand waving 100 roentgens is equal to 1 sievert
Re:When X-Rays were used at the Shoe Store
by quickthrowman on Tuesday November 03, 2020 @09:12AM
(#24979778)
Radiation from x-rays is measured in microsieverts, or less than a single day’s exposure to background radiation
https://www.iaea.org/resources/rpop/health-professionals/den...
> That 1948 study of 43 machines in Detroit showed ranges from 16 to 75 roentgens per minute. In 1946, the American Standards Association had issued a safety code for industrial use of X-rays, limiting exposure to 0.1 R per day.
I'd be curious how much a typical modern dental x-ray emits, but we no longer measure in roentgens these days as we have better measures of the actual dose (sieverts).