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CT scans--lots of radiation, little research.

Publication: HealthFacts
Publication Date: 01-MAY-09 		Format: Online
Delivery: Immediate Online Access
Full Article Title: CT scans--lots of radiation, little research.(computed tomography)

Article Excerpt
"The increase in CT [scan] use and in the CT-derived radiation dose in the population is occurring just as our understanding of the carcinogenic potential of low doses of x-ray radiation has improved substantially, particularly for children."

The low-dose in this quote is relative to the amount of radiation absorbed by atom-bomb survivors--long the only yardstick available to radiation-safety researchers. It appeared in a 2007 report in The New England Journal of Medicine which states that, contrary to conventional medical wisdom, the doses received by a CT scan carry a small but definitive risk of cancer. The lead author is David J. Brenner, PhD, Center for Radiological Research, Columbia University Medical Center, New York.

The radiation dose from a CT scan is far larger than that of a conventional x-ray because it typically involves 64 "slices" of radiation exposure, compared to one or...

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