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ESTABLISHING DIAGNOSTIC REFERENCE LEVELS FOR CARDIAC COMPUTED TOMOGRAPHY ANGIOGRAPHY IN SAUDI ARABIA

Ali B Alhailiy1,2, Peter L Kench1, Mark F McEntee1

  • 1Faculty of Health Sciences, The University of Sydney, M205, Cumberland Campus, 75 East St, Lidcombe, Sydney, New South Wales, Australia.

Radiation Protection Dosimetry
|January 20, 2018
PubMed

Insights

This study establishes national radiation dose benchmarks for cardiac CT angiography in Saudi Arabia. Findings show doses are comparable to European levels, highlighting effective dose-saving technologies and variations across facilities.

Area of Science:

  • Radiology
  • Medical Imaging
  • Radiation Protection

Background:

  • Cardiac computed tomography angiography (CCTA) is vital for diagnosing cardiovascular disease.
  • Patient radiation dose remains a significant concern despite technological advancements in CCTA.
  • Diagnostic Reference Levels (DRLs) are crucial for monitoring and optimizing radiation doses in CT procedures.

Purpose of the Study:

  • To assess patient radiation doses from CCTA procedures in Saudi clinical practices.
  • To establish new National Diagnostic Reference Levels (NDRLs) for CCTA in Saudi Arabia.
  • To compare Saudi NDRLs with international benchmarks and identify dose variation factors.

Main Methods:

  • Retrospective data collection via a structured booklet survey from participating centers.
  • Analysis of 197 CCTA datasets, including patient weight and scanning protocols.
  • Definition of NDRLs based on the 75th and 25th percentiles of CTDIvol and DLP, with specific DRLs for ECG-gating modes.

Main Results:

  • NDRLs for CTDIvol were 29 mGy (prospective gating) and 62 mGy (retrospective gating).
  • NDRLs for DLP were 393 mGy cm (prospective gating) and 1057 mGy cm (retrospective gating).
  • Saudi NDRLs are comparable or slightly lower than European DRLs, attributed to dose-saving technologies.

Conclusions:

  • Established NDRLs for CCTA in Saudi Arabia provide benchmarks for radiation dose optimization.
  • Significant variations in patient doses highlight the need for protocol standardization and quality control.
  • The findings support the effective use of dose-saving technologies in Saudi CCTA practices.

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