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Optimizing Radiation Doses for Computed Tomography Across Institutions: Dose Auditing and Best Practices.
Joshua Demb1, Philip Chu2, Thomas Nelson3
1Department of Epidemiology and Biostatistics, University of California, San Francisco.
JAMA Internal Medicine
|April 11, 2017
Summary
Institutional audits and best practice sharing significantly reduced radiation doses for chest and abdominal CT scans. Head CT doses became more consistent across institutions following these collaborative efforts.
Area of Science:
- Radiology
- Medical Imaging
- Radiation Safety
Background:
- Computed tomography (CT) radiation doses show significant institutional variability.
- Standardizing radiation doses is crucial for patient safety and effective healthcare.
Purpose of the Study:
- To evaluate the impact of institutional audits and collaborative best practice sharing on CT radiation doses.
- To assess changes in radiation dose metrics across five University of California medical centers.
Main Methods:
- A before-and-after interventional study design was employed.
- Radiation dose metrics for diagnostic CT scans were prospectively collected.
- Audit reports were generated and shared, followed by a collaborative meeting to discuss best practices.
Main Results:
- Mean effective dose for chest CT decreased by 18.9% (13.2 to 10.7 mSv) and for abdominal CT by 25.0% (20.0 to 15.0 mSv).
- Proportions of scans exceeding benchmarks reduced by 48% (chest) and 54% (abdomen).
- Head CT doses showed less variation post-intervention, though individual institutional trends differed.
Conclusions:
- Collaborative review of institutional doses and sharing of dose-optimization strategies effectively lowered radiation doses for chest and abdominal CT.
- The intervention led to more consistent radiation doses for head CT examinations.