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  1. Home
  3. Updating National Diagnostic Reference Levels For Computed Tomography In Greece: Challenges On Patient Protection Optimisation.
  1. Home
  3. Updating National Diagnostic Reference Levels For Computed Tomography In Greece: Challenges On Patient Protection Optimisation.

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Updating national diagnostic reference levels for computed tomography in Greece: Challenges on patient protection

George Simantirakis1, Costas J Hourdakis1, Maria Kalathaki1

  • 1Greek Atomic Energy Commission, P.O. Box 60092, 153 10, Agia Paraskevi, Athens, Greece.

European Journal of Radiology
|March 20, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Diagnostic Reference Levels (DRLs) for adult CT scans were revised in Greece, showing a modest dose reduction. Ongoing optimization is crucial due to increased CT use and evolving technologies for patient safety.

Keywords:
Computed tomographyDiagnostic reference levelsOptimisation

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Area of Science:

  • Medical Imaging
  • Radiological Physics
  • Radiation Protection

Background:

  • Computed Tomography (CT) use is increasing globally.
  • Diagnostic Reference Levels (DRLs) are essential for optimizing patient radiation dose.
  • Periodic revision of DRLs is necessary to reflect technological advancements and usage patterns.

Purpose of the Study:

  • To revise national Diagnostic Reference Levels (DRLs) for adult CT examinations in Greece.
  • To establish DRLs for new CT examinations, including neck, cervical spine, pelvic bones-hips, coronary artery calcium (Ca) score, and cardiac computed tomography angiography (CCTA).
  • To assess current dosimetric practices and identify areas for optimization.

Main Methods:

  • A national survey collected dosimetric data (CTDIvol and scan DLP) from 127 CT scanners across 120 medical facilities (2019-2022).
  • Data represented 25% of the country's CT scanners, ensuring geographic and technological diversity.
  • DRLs were revised for 7 existing examinations and established for 5 new ones.

    • Main Results:

    • Revised DRLs showed an average decrease of 15% in CTDIvol and 7% in scan DLP compared to initial DRLs.
    • The observed dose reduction was modest compared to findings in other national studies.
    • Significant variations in dosimetric values and scan lengths were noted across different scanners, highlighting the need for standardization.

    Conclusions:

    • The revised DRLs, officially adopted in Greece, aim to optimize patient radiation doses in CT imaging.
    • Advanced technologies like Iterative Reconstruction (IR) show potential for dose reduction, but uniform implementation remains a challenge.
    • Continuous efforts in optimization are vital given the rising CT utilization and technological evolution.