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Radiation Effective Doses to Adults Undergoing Modified Barium Swallow Studies.

Sameer V Tipnis1, Walter Huda2, Janina Wilmskoetter3

  • 1Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA.

Dysphagia
|April 23, 2021
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Summary

Modified Barium Swallow Studies (MBSSs) are low-radiation diagnostic exams for swallowing impairment. The average effective dose is 0.32 mSv, confirming MBSSs as a low-dose procedure for clinical decision-making.

Keywords:
Deglutition disordersFluoroscopyRadiation

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Area of Science:

  • Radiology
  • Diagnostic Imaging
  • Swallowing Disorders

Background:

  • Modified Barium Swallow Studies (MBSSs) are crucial for diagnosing swallowing impairments and guiding treatment.
  • MBSSs involve ionizing radiation, necessitating an understanding of associated radiation exposure.
  • Accurate radiation dose data is vital for evidence-based clinical decision-making and patient counseling.

Purpose of the Study:

  • To determine and report the average radiation dose from routine clinical MBSSs in adult patients.
  • To provide data that aids clinicians and patients in assessing the risks versus benefits of MBSSs.
  • To establish a benchmark for comparing MBSS radiation exposure to other medical and environmental sources.

Main Methods:

  • Retrospective analysis of 200 consecutive adult MBSS exams.
  • Calculation of effective dose using kilovoltage (kV) and Kerma Area Product data.
  • Examination of radiation doses across different imaging projections (lateral, PA).

Main Results:

  • The average effective dose per MBSS exam was 0.32 ± 0.23 mSv.
  • Lateral projection was used in 100% of exams; PA projections were used in approximately 72% (upper) and 25% (middle/lower).
  • Average kVs ranged from 63 kV (lateral) to 94.3 kV (lower PA).

Conclusions:

  • Routine adult MBSSs are confirmed as a low-dose examination.
  • The findings support the continued use of MBSSs for obtaining critical information on swallow function.
  • Adherence to ALARA principles and radiation safety protocols remains essential for all X-ray procedures, including MBSSs.