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ESTIMATION OF THE EFFECTIVE DOSES FROM TYPICAL FLUOROSCOPIC EXAMINATIONS WITH BARIUM CONTRAST.

Aleksandr Vodovatov1,2, Vladislav Golikov1, Irina Kamyshanskaja3,4

  • 1Laboratory of radiation hygiene of medical facilities, St-Petersburg Research Institute of Radiation Hygiene after Professor P.V. Ramzaev, Mira st. 8, St-Petersburg 197101, Russia.

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This study calculated effective doses and conversion coefficients for barium swallow, meal, and enema procedures. Examination parameters significantly influence radiation dose and conversion coefficients in diagnostic imaging.

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Area of Science:

  • Medical Physics
  • Radiological Sciences
  • Diagnostic Imaging

Background:

  • Barium contrast studies (swallow, meal, enema) are common diagnostic procedures.
  • Accurate estimation of radiation doses is crucial for patient safety and optimization of imaging protocols.
  • Variability in examination parameters can affect patient radiation exposure.

Purpose of the Study:

  • To estimate effective doses and conversion coefficients (CCs) for barium swallow (BS), barium meal (BM), and barium enema (BE) protocols.
  • To evaluate the impact of different examination parameters on CCs.
  • To provide data for optimizing radiation protection in barium contrast studies.

Main Methods:

  • Data collection from surgical and therapy departments at St. Petersburg Urban Mariinsky Hospital.
  • Development of computational models using PCXMC 2.0 software.
  • Estimation of CCs (μSv × μGy⁻¹ × m⁻²) for different barium study protocols and exposure geometries.

Main Results:

  • Estimated CCs varied based on the specific barium study (BS, BM, BE) and department (surgical, therapy).
  • For example, CCs for BM were 2.4 and 2.0 (surgical) and 2.5 and 3.8 (therapy) for over and under couch exposures, respectively.
  • Effective doses and CCs were found to be influenced by fluoroscopic series, X-ray projections, field size, and beam energy.

Conclusions:

  • The study provides essential data on effective doses and CCs for common barium contrast procedures.
  • Examination parameters, including imaging techniques and X-ray beam characteristics, significantly impact radiation dose.
  • Findings can inform radiation protection strategies and protocol optimization in diagnostic radiology.