A team of pediatric neurosurgeons and neuroradiologists at the Johns Hopkins Children’s Center has developed a way to minimize dangerous radiation exposure in children with a condition that requires repeat CT scans of the brain. The experts say they reduced exposure without sacrificing the diagnostic accuracy of the images or compromising treatment decisions.

The approach, described ahead of print in a report in the Journal of Neurosurgery, calls for using fewer slices of the brain taken by CT scanners ¯ seven instead of the usual 32 to 40 slices. The approach, the study found, reduced radiation exposure by an average of nearly 92 percent per patient compared with standard head CT scans, while still rendering the images diagnostically accurate.

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