Computed tomographic colography and virtual colonoscopy

D. A. Ahlquist, A. K. Hara, C. D. Johnson

Research output: Contribution to journalReview articlepeer-review

21 Scopus citations


CT colography (CTC) is a powerful new approach to imaging the colorectum and a promising screening tool for the detection of colorectal neoplasia. From data generated by a helical CT scan, CTC uses virtual reality technology to produce highly discriminant two- and three-dimensional images that permit a thorough and minimally invasive evaluation of the entire colorectum. A dynamic CTC display technique from the endoluminal perspective, called virtual colonoscopy, simulates colonoscopy by 'flying' through the three-dimensional colon image. CTC offers potential advantages in diagnostic performance, safety, and patient acceptance over current screening approaches. Although early data suggest excellent colorectal polyp detection rates, this nascent technology will require rigorous clinical investigation and further refinements to assess adequately its place in the endoscopist's armamentarium.

Original languageEnglish (US)
Pages (from-to)439-452
Number of pages14
JournalGastrointestinal Endoscopy Clinics of North America
Issue number3
StatePublished - 1997

ASJC Scopus subject areas

  • Gastroenterology


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