Current Colorectal Cancer Reports

, Volume 7, Issue 1, pp 71–79

Decreased-Purgation CT Colonography: State of the Art


  • Shmuel Y. Mahgerefteh
    • Department of RadiologyHadassah-Hebrew University Medical Center
  • Arye Blachar
    • Department of RadiologyTel Aviv, Sourasky Medical Center
  • Shifra Fraifeld
    • Department of RadiologyHadassah-Hebrew University Medical Center
    • Department of RadiologyHadassah-Hebrew University Medical Center
    • Department of RadiologyBeth Israel Deaconess Medical Center

DOI: 10.1007/s11888-010-0085-7

Cite this article as:
Mahgerefteh, S.Y., Blachar, A., Fraifeld, S. et al. Curr Colorectal Cancer Rep (2011) 7: 71. doi:10.1007/s11888-010-0085-7


In the setting of CT colonography (CTC), decreasing bowel preparation measures may help to optimize colorectal cancer screening compliance without compromising accuracy. Decreased-purgation or wholly noncathartic CTC, known as nonconventional CTC, may be accomplished in conjunction with fecal tagging. Image post-processing technologies such as electronic cleansing and computer-aided detection may boost accuracy and decrease the need for bowel preparation even further. We review pre-study preparation and image post-processing techniques that have been described in nonconventional-preparation CTC studies over the past 10 years. We explore in detail specific aspects of nonconventional cathartic and fecal tagging regimens, including substance, dose, and time frame of ingestion.


CT colonographyVirtual colonoscopyFecal taggingBowel preparationCatharsisPurgationElectronic cleansingSpectral cleansingComputer-aided detectionVirtual taggingColorectal cancer screening

Copyright information

© Springer Science+Business Media, LLC 2010