These can save lives, but they also deliver megadoses of radiation – 500 times that of a regular X-ray. While your chances of getting cancer from a single scan are 1 in 600, multiple scans can create a problem. In general, CT scans of the head should be avoided when possible.
Credit: Getty Images
The 2014 Adventure Issue
From Iceland's Highway 1 to Utah's Canyonlands, an epic itinerary for modern explorers.
Plus: Building a Bigger Action Hero
ON NEWSSTANDS NOW
The Interpreters We Left Behind
The Rise of Cyclocross
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