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Related Experiment Videos

Effective doses for coronary angiography

K C Leung1, C J Martin

  • 1Department of Bio-Medical Physics and Bio-Engineering, Aberdeen University, Foresterhill, UK.

The British Journal of Radiology
|May 1, 1996
PubMed
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This study analyzed dose data from 100 coronary angiographies, finding fluoroscopy contributed 32% to the dose-area product (DAP). Conversion factors were derived to estimate effective dose from DAP measurements in digital X-ray imaging.

Area of Science:

  • Medical Imaging
  • Radiological Physics
  • Radiation Protection

Background:

  • Coronary angiography involves significant radiation exposure.
  • Accurate estimation of effective dose is crucial for patient safety.
  • Digital X-ray units require specific dose assessment protocols.

Purpose of the Study:

  • To analyze dose-area product (DAP) data from coronary angiography.
  • To determine the contribution of fluoroscopy and radiography to DAP.
  • To derive conversion factors for estimating effective dose from DAP.

Main Methods:

  • Analysis of DAP data from 100 coronary angiography examinations.
  • Examination of dose contributions from fluoroscopy and radiography across different projections.

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  • Derivation of conversion factors using data from 10 selected patients.

    • Main Results:

    • Fluoroscopy accounted for 32% of the total DAP.
    • The mean DAP was 14 Gy cm², with a corresponding mean effective dose of 3.1 mSv.
    • Conversion factors were established for various tube potentials and filtrations.

    Conclusions:

    • Established conversion factors facilitate effective dose estimation from DAP in digital X-ray procedures.
    • Findings provide valuable data for radiation protection in interventional cardiology.
    • Standardized analysis of DAP aids in consistent dose monitoring across different units.