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Related Experiment Video

Updated: Jul 17, 2026

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Bowel hot spots at PET-CT.

Hima B Prabhakar1, Dushyant V Sahani, Alan J Fischman

  • 1Department of Radiology, Division of Abdominal Imaging and Interventional Radiology, Massachusetts General Hospital, 55 Fruit St, White 270, Boston, MA 02114, USA.

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|January 20, 2007
PubMed
Summary

Positron emission tomography (PET) with 2-[fluorine-18]fluoro-2-deoxy-d-glucose (FDG) is sensitive for bowel cancer but lacks specificity. Understanding FDG uptake patterns on PET-CT is crucial for accurate interpretation and further testing.

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Area of Science:

  • Nuclear Medicine
  • Radiology
  • Oncology

Background:

  • Positron emission tomography (PET) with 2-[fluorine-18]fluoro-2-deoxy-d-glucose (FDG) demonstrates sensitivity for detecting bowel malignancies.
  • However, its specificity is limited due to diverse physiological and pathological patterns of bowel FDG uptake.

Purpose of the Study:

  • To highlight the utility of PET-computed tomography (PET-CT) in localizing and characterizing increased FDG uptake within the bowel.
  • To emphasize the importance of recognizing these patterns for staging and monitoring oncologic disease.

Main Methods:

  • Utilizing PET-CT for imaging bowel abnormalities.
  • Employing negative oral contrast agents for improved bowel distention and artifact reduction.
  • Correlating PET findings with the CT component to identify causes of focal or segmental bowel uptake.

Main Results:

  • PET-CT aids in characterizing FDG-avid foci within the bowel.
  • Negative oral contrast enhances visualization and minimizes artifacts.
  • CT correlation can help elucidate the etiology of bowel uptake.

Conclusions:

  • Familiarity with bowel FDG uptake patterns on PET-CT is essential for accurate interpretation.
  • Awareness of potential pitfalls, such as bowel motility and mimicking lesions, is critical.
  • Adherence to basic interpretation principles ensures reliable assessment of bowel findings with PET-CT.