Magnetic resonance colonography with fecal tagging: an innovative approach without bowel cleansing

Top Magn Reson Imaging. 2002 Dec;13(6):435-44. doi: 10.1097/00002142-200212000-00007.


To date, virtual colonography mandates bowel cleansing in a manner similar to colonoscopy. Because more than half of patients undergoing bowel preparation complain about negative side effects, patient acceptance is negatively impacted. To assure high patient acceptance of MR colonography, bowel cleansing needs to be eliminated. This can be accomplished by fecal tagging, a concept based on altering the signal intensity of stool by adding contrast-modifying substances to regular meals. This article describes different fecal tagging approaches and points out both advantages and limitations of these strategies.

Publication types

  • Review

MeSH terms

  • Barium Sulfate
  • Colonoscopy
  • Colorectal Neoplasms / diagnosis*
  • Contrast Media / administration & dosage*
  • Feces*
  • Heterocyclic Compounds / administration & dosage*
  • Humans
  • Magnetic Resonance Imaging / methods*
  • Organometallic Compounds / administration & dosage*


  • Contrast Media
  • Heterocyclic Compounds
  • Organometallic Compounds
  • Barium Sulfate
  • gadolinium 1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetate