The scans typically deliver about 70 times the radiation of normal X-rays.
GREENVILLE, S.C. — CT scans have transformed medicine.
They can provide stunningly detailed images of the inside of the brain.
They can pinpoint the precise location of a potentially fatal blood clot in the lungs.
And they can show pictures of a beating heart so clear that a cardiothoracic surgeon knows what he will encounter before he has made the first incision.
That's all improved diagnosis and treatment for countless millions.
But these scans aren't without risk.
They deliver much more radiation than X-rays. And some fear that these tests can cause cancer later in life, particularly in children.
CT, or computerized tomography, scans use a series of X-rays taken from many angles to provide cross-sectional images of the inside of the body, according to the National Institutes of Health.
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