The study by Demb and colleagues reports on the positive results of an intervention strategy to reduce excess radiation exposure across 5 academic medical centers associated with the University of California. Leading up to this intervention, a variety of initiatives and recommendations had been implemented across these institutions to help guide institutions in this effort. However, significant variation between institutions had remained, in part because single institutions found it difficult to determine the "right" dose of radiation that balances diagnostic accuracy and minimizes radiation exposure for the patient.

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