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Workload and use factor data for a modern digital radiography system.

Krystal M Kirby1, Beth A Schueler1, Laurel A Littrell1

  • 1Department of Radiology, Mayo Clinic, Rochester, Minnesota, USA.

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|March 21, 2023
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Summary
This summary is machine-generated.

Modern digital radiography (DR) workload is significantly lower than older film-screen estimates. This study found hospital DR practices use 44% less radiation per patient than NCRP Report No. 147 guidelines.

Keywords:
digital radiographypediatric radiographyshieldingworkload

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Area of Science:

  • Medical Physics
  • Radiologic Technology
  • Health Physics

Background:

  • NCRP Report No. 147 structural shielding design relies on film-screen workload data.
  • This data may not accurately reflect modern digital radiography (DR) practices.
  • Assessing current clinical workload is crucial for accurate radiation shielding calculations.

Purpose of the Study:

  • To evaluate clinical workload distributions of contemporary DR systems.
  • To compare DR workload data with established NCRP Report No. 147 values.
  • To inform updated radiation safety guidelines for diagnostic imaging.

Main Methods:

  • Retrospective analysis of DR imaging data from general hospital and pediatric practices (2019-2021).
  • Utilized a custom DICOM header analytics program to extract kVp, mAs, and detector type.
  • Calculated total workload by summing exposures, normalized by patient count, and analyzed kVp histograms.

Main Results:

  • General hospital median workload was 0.43 mA-min/patient (average 1.36 ± 3.08).
  • Pediatric practice median workload was 0.10 mA-min/patient (average 0.29 ± 0.69).
  • Hospital workload was approximately 44% lower than NCRP Report No. 147 estimates.

Conclusions:

  • Current DR clinical workloads are substantially lower than those used in NCRP Report No. 147.
  • Existing shielding design recommendations may overestimate workload for modern DR systems.
  • Further research is needed to update radiation safety standards based on current digital imaging practices.