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Some CT scans may have too much radiation, researchers say

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About 93 million CT scans are performed every year in the United States .

Yet there is scant regulation of radiation levels as the machines scan organs and structures inside bodies.

One CT scan can expose a patient to 10 or 15 times as much radiation as another, a researcher says.

The new data collection rules from the Centers for Medicare & Medicaid Services issued in the closing months of the Biden administration.

Concerns about CT dosing are long-standing.

CT scans were responsible for 29,000 excess cancer cases a year in the United States .

By 2016 , the number of CT scans was estimated at 74 million , up 20% in a decade .

Some researchers have noted that U.S. doctors order far more imaging than other developed countries.

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