Rise-in-kids-CT-scans-raises-alarm
"In the US, the average radiation dose to which we are exposed has doubled in the past 30 years. The average dose from natural background sources has not changed, but what has changed is a more than six-fold increase in the average radiation dose from medical imaging. The biggest contributor to this increase in the radiation dose from medical imaging is from CT: In 1980, about 3 million CT scans were done each year in the US, whereas the number now is over 70 million. Radiation doses from CT are typically more 100 times those from conventional x-ray exams, such as a chest x-rays or mammograms, and there is now direct epidemiological evidence of a small but statistically significant increased lifetime cancer risk at CT doses."
http://sciencewatch.com/inter/aut/2010/10-mar/10marBren/
