3 ms·
Excess Cancer Mortality per 100,000 individuals exposed to 100mSv is ~1000 in the 1 year-old male cohort. A single scan is ~3mSv, which makes the mortality ~30
by jozvolskyef 5y ago
Excess Cancer Mortality per 100,000 individuals exposed to 100mSv is ~1000 in the 1 year-old male cohort. A single scan is ~3mSv, which makes the mortality ~30 per 100k, or 1 in ~3333, assuming the linear no-threshold model[1].
When someone comes to the ER with a traumatic brain injury, a CT scan is the standard practice because they are at a high risk of dying and presumably the scan is important for reducing the risk.
[1]: https://en.wikipedia.org/wiki/Linear_no-threshold_model https://en.wikipedia.org/wiki/Linear_no-threshold_model
- mercutio2 5y agoI'm so glad you mentioned the linear no-threshold model. Do you believe in it? I don't, particularly at the single digit mSv level.
- jozvolskyef 5y agoAt some point there will be enough data from different countries to confidently support or reject it. Until then I see it as the preferred hypothesis by Occam's razor and also because I'd rather err on the side of caution.