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Sodium bromide acts as a contrast material on DEXA scanning
1Internal Medicine Residency Training Program, LSU Unit, Earl K. Long Medical Center, Baton Rouge.
Summary
Dual-energy X-ray absorptiometry (DEXA) scanning can misinterpret oral sodium bromide as calcium, leading to inaccurate body composition analysis. This study highlights a potential pitfall for researchers using DEXA and bromide dilution methods.
Area of Science:
- Medical Imaging
- Body Composition Analysis
- Biophysics
Background:
- Dual-energy X-ray absorptiometry (DEXA) is a common method for assessing body composition.
- Bromide dilution is used to determine extracellular water volume.
- Potential interferences in DEXA scanning can affect accuracy.
Purpose of the Study:
- To investigate the interaction between oral sodium bromide and DEXA scanning.
- To identify a potential pitfall in body composition analysis.
- To inform researchers about imaging artifacts.
Main Methods:
- Subjects underwent DEXA scanning and bromide dilution for body composition assessment.
- Oral sodium bromide was administered to some subjects.
- DEXA scan data was analyzed for abnormalities.
Main Results:
- Abnormal DEXA scans were observed in subjects who ingested sodium bromide.
- Sodium bromide was visualized as a contrast material within the stomach on DEXA scans.
- Bromide shares imaging properties with calcium on DEXA.
Conclusions:
- Oral sodium bromide can be misidentified as calcium by DEXA scanners.
- This can lead to erroneous body composition measurements.
- Awareness of this artifact is crucial for accurate DEXA-based research.