Abdominal Imaging

, Volume 35, Issue 5, pp 596–601

CT colonography versus double-contrast barium enema for screening of colorectal cancer: comparison of radiation burden

Authors

    • Diagnostic and Interventional RadiologyUniversity of Pisa
  • Lorenzo Faggioni
    • Diagnostic and Interventional RadiologyUniversity of Pisa
  • Francesca Cerri
    • Diagnostic and Interventional RadiologyUniversity of Pisa
  • Francesca Turini
    • Diagnostic and Interventional RadiologyUniversity of Pisa
  • Simone Angeli
    • Diagnostic and Interventional RadiologyUniversity of Pisa
  • Lorenzo Cini
    • Diagnostic and Interventional RadiologyUniversity of Pisa
  • Franco Perrone
    • Department of PhysicsUniversity of Pisa
  • Fabio Paolicchi
    • Diagnostic and Interventional RadiologyUniversity of Pisa
  • Carlo Bartolozzi
    • Diagnostic and Interventional RadiologyUniversity of Pisa
Article

DOI: 10.1007/s00261-009-9568-x

Cite this article as:
Neri, E., Faggioni, L., Cerri, F. et al. Abdom Imaging (2010) 35: 596. doi:10.1007/s00261-009-9568-x

Abstract

Our aim is to compare the radiation dose associated with a low-dose CT colonography (CTC) protocol for colorectal cancer screening with that delivered by double-contrast barium enema (DCBE). CTC of twenty asymptomatic individuals (M:F = 10:10) participating to a colorectal cancer screening program and DCBE of fifteen patients (M:F = 6:9) were evaluated. For CTC, absorbed dose was determined by calculating the dose-length product for each CTC examination from measurements on a CT dose phantom equipped with a CT ion chamber. For DCBE, the free-in-air Kerma at the patient’s X-ray entry surface and the Kerma-area product during fluoroscopy and fluorography were measured with a Barracuda system, with fluoroscopy times being recorded blinded to the performing operator. Effective dose at CTC was 2.17 ± 0.12 mSv, with good and excellent image quality in 14/20 (70%) and 6/20 cases (30%), respectively. With DCBE, effective patient dose was 4.12 ± 0.17 mSv, 1.9 times greater than CTC (P < 0.0001). Our results show that effective dose from screening CTC is substantially lower than that from DCBE, suggesting that CTC is the radiological imaging technique of the large bowel with the lowest risk of stochastic radiation effects.

Keywords

Computed tomographic colonographyMultidetector computed tomographyDouble-contrast barium enemaRadiation doseColorectal cancer screening

Copyright information

© Springer Science+Business Media, LLC 2009