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Trade-off between pulse rate and radiation dose during modified barium swallow examination: what is the reality?

S J Galgano1, D Gauntt1, M R Boyd2

  • 1University of Alabama at Birmingham, Department of Radiology, Birmingham, AL, USA.

Clinical Radiology
|July 2, 2019
PubMed
Abstract

Insights

Modifying dose mode and frame rate in modified barium swallow (MBS) examinations significantly reduced patient radiation dose. These changes did not increase fluoroscopy time, enhancing safety during these diagnostic procedures.

Area of Science:

  • Radiology
  • Medical Imaging
  • Radiation Safety

Background:

  • Modified Barium Swallow (MBS) examinations are crucial for assessing swallowing disorders.
  • Patient radiation dose during MBS procedures is a significant concern for healthcare providers.
  • Optimizing imaging parameters is essential for minimizing radiation exposure.

Purpose of the Study:

  • To evaluate the impact of altering dose mode and frame rate on patient radiation dose during MBS examinations.
  • To determine if changes in imaging parameters affect fluoroscopy time.

Main Methods:

  • A retrospective review of 827 MBS examinations was conducted.
  • Patients were categorized into pre- and post-implementation cohorts based on MBS Impairment Profile (MBSImP) standardization.
  • Phantom studies were performed to test dose variations between low/normal dose and high/low dose modes.

Main Results:

  • The mean radiation dose decreased from 5.86 mGy to 4.72 mGy (p<0.0001) after standardization.
  • The mean fluoroscopy time remained comparable between the two cohorts (83.8s vs 82.3s, p=0.62).
  • The dose rate significantly decreased from 4.35 mGy/s to 3.55 mGy/s (p<0.0001).

Conclusions:

  • Adjusting to a lower dose mode and increasing the frame rate effectively reduced patient radiation dose during MBS.
  • These modifications did not lead to an increase in fluoroscopy time.
  • The findings support the implementation of standardized protocols to optimize radiation safety in MBS procedures.

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