Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 3 · column 5 of 7 · from the scan, no model involved
received if a person had 200 chest Xrays in one year.
Dr. Einarson explained that the Surgeon General’s recent report was based on extrapolated data. It took studies of uranium miners — a group which had a known exposure to radioactive gas — and used it to estimate the risk of radon exposure in a home at a given level of concentration of the gas.
Using those figures, which provided estimates of increased risk of lung cancer at different exposure levels, the EPA arrived at the 4 pCi/1 figure of a maximum safe limit of radon gas in the home.
88.1%