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Organ and effective doses in infants undergoing upper gastrointestinal (UGI) fluoroscopic examination

Robert J Staton1, Jonathon L Williams, Manuel M Arreola

  • 1Department of Nuclear and Radiological Engineering, University of Florida, Gainesville, Florida 32611-8300, USA.

Medical Physics
|March 29, 2007
PubMed

Insights

This study quantifies organ and effective radiation doses in newborn upper gastrointestinal (UGI) fluoroscopy. Mean effective dose was 3.14 mSv, with lungs being the most significant organ contributing to dose.

Area of Science:

  • Medical Physics
  • Pediatric Radiology

Background:

  • Digital upper gastrointestinal (UGI) fluoroscopy is crucial for diagnosing conditions in newborns and infants.
  • Detailed organ and effective dose data are needed for pediatric UGI examinations to ensure radiation safety.

Purpose of the Study:

  • To provide precise organ and effective dose data for digital UGI fluoroscopy in newborns and infants.
  • To compare dose metrics between UGI studies and voiding cystourethrograms (VCUG) in this population.

Main Methods:

  • Utilized a time-sequence videotape-analysis technique on recorded UGI fluoroscopy procedures.
  • Analyzed individual video frames for parameters like field size, projection, and imaging settings.
  • Employed a patient-scalable newborn computational phantom and Monte Carlo radiation transport for dose calculations.

Main Results:

  • Effective dose values ranged from 1.17 to 6.47 mSv (mean 3.14 mSv).
  • The colon, lungs, stomach, liver, and esophagus accounted for 63-75% of the effective dose.
  • Lungs were the most significant organ (23-30% of effective dose); dynamic fluoroscopy contributed 80-95% of the dose.

Conclusions:

  • The study provides essential radiation dose data for pediatric UGI fluoroscopy.
  • Mean effective dose in newborn UGI studies is comparable to that in newborn VCUG examinations.
  • Lungs are a critical organ for dose considerations in these procedures.

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