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Experts recommend closer scrutiny of radiation exposure from CT scans
Date:11/28/2012

t to get a larger dose, and for others, turning it the same way gives a smaller dose," said Boone. "There are so many differences in current CT scanners, it can be like driving a car with the brake pedal on the left in the morning, then with the brake on the right in the afternoon."

CT scans should be built more like cars, he argued, which may have different exteriors, dashboards and seat coverings but are standardized across the industry so that they are driven the same way, making driving errors unlikely to occur when switching from one kind of car to another.

The experts call for academic and professional radiology societies, as well as industry trade organizations, to exert pressure on CT manufacturers to standardize nomenclature and control consoles to help avoid mistakes.

The experts also considered "wasteful imaging" -- tests that have little impact on patient diagnoses or outcomes -- resulting in unnecessary radiation exposures. Wasteful imaging can arise if physicians are unaware of a patient's prior tests or don't really know whether a scan will benefit a patient with certain signs and symptoms. In addition, physicians may order tests they know are only marginally useful to avoid accusations of negligence in a possible future lawsuit. The experts recommend use of information technology to develop national imaging and radiation exposure registries, as well as standardized protocols that guide physicians on the use of optimal imaging modalities for different clinical problems.

The University of California recently provided grants to all five of its medical schools to develop methods for more accurate measures of radiation exposure from CT scans and to build protocols that improve diagnostic information and reduce radiation risks. According to Boone, the tools under development are very powerful and will move the UC system toward achieving the goals outlined during the Radiation Dose Summit.


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Contact: Dorsey Griffith
dorsey.griffith@ucdmc.ucdavis.edu
916-734-9118
University of California - Davis Health System
Source:Eurekalert

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