Comparing the Diagnostic Yields of Technologists and Radiologists in an Invitational Colorectal Cancer Screening Program Performed with CT Colonography

MC de Haan, CY Nio, Maarten Thomeer, AH de Vries, PM Bossuyt, Ernst Kuipers, E (Erwin) Dekker, J Stoker

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Purpose: To compare the diagnostic yields of a radiologist and trained technologists in the detection of advanced neoplasia within a population-based computed tomographic (CT) colonography screening program. Materials and Methods: Ethical approval was obtained from the Dutch Health Council, and written informed consent was obtained from all participants. Nine hundred eighty-two participants (507 men, 475 women) underwent low-dose CT colonography after noncathartic bowel preparation (iodine tagging) between July 13, 2009, and January 21, 2011. Each scan was evaluated by one of three experienced radiologists (>= 800 examinations) by using primary two-dimensional (2D) reading followed by secondary comp Results: Overall, 96 of the 982 participants were referred for colonoscopy and 104 were scheduled for surveillance. Sixty of 84 participants (71%) referred for colonoscopy by the radiologist had advanced neoplasia, compared with 55 of 64 participants (86%) referred by two technologists. Both the radiologist and technologists detected all colorectal cancers (n = 5). The relative TP fraction (for technologists vs radiologist) for advanced neoplasia was 0.92 (95% CI: 0.78, 1.07), and the relative F Conclusion: Two technologists serving as a primary reader of CT colonographic images can achieve a comparable sensitivity to that of a radiologist for the detection of advanced neoplasia, with far fewer FP referrals for colonoscopy. (C) RSNA, 2012
Original languageUndefined/Unknown
Pages (from-to)771-778
Number of pages8
Issue number3
Publication statusPublished - 2012

Research programs

  • EMC MM-04-20-01
  • EMC NIHES-03-30-01

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