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Related Experiment Videos

18FDG uptake in brown fat: potential for false positives.

Kevin D Evans1, Timothy A Tulloss, Nathan Hall

  • 1Radiologic Sciences and Therapy, Division of the School of Allied Medical Professions and the Department of Radiology at the Ohio State University, Columbus, OH, USA.

Radiologic Technology
|May 24, 2007
PubMed
Summary
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False-positive PET scans due to brown fat uptake are common in women and children, especially in cold climates. Awareness of these factors is crucial for accurate diagnosis.

Area of Science:

  • Nuclear Medicine
  • Radiology
  • Medical Imaging

Background:

  • (18)FDG-PET and PET-CT are widely used imaging techniques.
  • (18)FDG uptake in brown adipose tissue (BAT) can mimic malignancy, leading to false-positive findings.
  • Understanding factors influencing BAT uptake is essential for accurate interpretation.

Purpose of the Study:

  • To identify patient demographics, anatomical locations, and environmental conditions associated with (18)FDG uptake in brown fat.
  • To elucidate the causes of false-positive PET diagnoses related to brown fat.
  • To improve the diagnostic accuracy of (18)FDG-PET imaging.

Main Methods:

  • A comprehensive literature review was performed.
  • Studies investigating factors contributing to (18)FDG uptake in brown fat were analyzed.

Related Experiment Videos

  • Data on patient characteristics, body regions, and environmental influences were synthesized.

    • Main Results:

    • Brown adipose tissue is prevalent in women and children.
    • Common sites for brown fat include the supraclavicular, mediastinal, paravertebral, and perirenal regions.
    • Cold ambient temperatures increase (18)FDG uptake in brown fat, potentially causing false-positive results.

    Conclusions:

    • False-positive PET findings due to brown fat are a significant concern, particularly in women and children.
    • Increased awareness of brown fat uptake is needed, especially during winter months and in cold climates.
    • This knowledge is critical for interpreting PET/PET-CT scans, particularly in young female patients.