I worry that I haven’t had the baseline mammogram I was supposed to have 10 years before my mother was diagnosed. I worry about the cough I’ve had for over a month that never seems to go away. I worry about blood tests I haven’t taken for my annual physical…I worry I have ca...
A chest or abdominal CT scan involves 10 to 20 millisieverts, versus 0.01 to 0.1 for an ordinary chest X-ray, less than 1 for a mammogram, and as little as 0.005 for a dental X-ray. Natural radiation from the sun and soil accounts for about 2 millisieverts a year. A big study l...