European Radiology

, Volume 16, Issue 8, pp 1745–1749

CT colonography interpretation times: effect of reader experience, fatigue, and scan findings in a multi-centre setting

Authors

  • David Burling
    • Intestinal Imaging CentreSt. Marks Hospital
  • Steve Halligan
    • Specialist Radiology, Level 2 PodiumUniversity College Hospital
  • Douglas G. Altman
    • Centre for Medical Statistics
  • Wendy Atkin
    • Cancer Research UKSt Mark’s Hospital
  • Clive Bartram
    • Intestinal Imaging CentreSt. Marks Hospital
  • Helen Fenlon
    • Mater Misericordiae
  • Andrea Laghi
    • La Sapienza
  • Jaap Stoker
    • Amsterdam Medical Centre
  • Stuart Taylor
    • Specialist Radiology, Level 2 PodiumUniversity College Hospital
  • Roger Frost
    • Salisbury District Hospital
  • Guido Dessey
    • Stedelijk Ziekenhuis
  • Melinda De Villiers
    • Intestinal Imaging CentreSt. Marks Hospital
  • Jasper Florie
    • Amsterdam Medical Centre
  • Shane Foley
    • Mater Misericordiae
  • Lesley Honeyfield
    • Intestinal Imaging CentreSt. Marks Hospital
  • Riccardo Iannaccone
    • La Sapienza
  • Teresa Gallo
    • Candiolo Oncologic Hospital
  • Clive Kay
    • Bradford Royal Infirmary
  • Philippe Lefere
    • Stedelijk Ziekenhuis
  • Andrew Lowe
    • Bradford Royal Infirmary
  • Filipo Mangiapane
    • La Sapienza
  • Jesse Marrannes
    • Stedelijk Ziekenhuis
  • Emmanuele Neri
    • University of Pisa
  • Giulia Nieddu
    • Candiolo Oncologic Hospital
  • David Nicholson
    • Hope Hospital
  • Alan O’Hare
    • Mater Misericordiae
  • Sante Ori
    • La Sapienza
  • Benedetta Politi
    • University of Pisa
  • Martin Poulus
    • Amsterdam Medical Centre
  • Daniele Regge
    • Candiolo Oncologic Hospital
  • Lisa Renaut
    • Hope Hospital
  • Velauthan Rudralingham
    • Hope Hospital
  • Saverio Signoretta
    • Candiolo Oncologic Hospital
  • Paola Vagli
    • University of Pisa
  • Victor Van der Hulst
    • Amsterdam Medical Centre
  • Jane Williams-Butt
    • Bradford Royal Infirmary
Gastrointestinal

DOI: 10.1007/s00330-006-0190-9

Cite this article as:
Burling, D., Halligan, S., Altman, D.G. et al. Eur Radiol (2006) 16: 1745. doi:10.1007/s00330-006-0190-9

Abstract

Our purpose was to assess the effect of reader experience, fatigue, and scan findings on interpretation time for CT colonography. Nine radiologists (experienced in CT colonography); nine radiologists and ten technicians (both groups trained using 50 validated examinations) read 40 cases (50% abnormal) under controlled conditions. Individual interpretation times for each case were recorded, and differences between groups determined. Multi-level linear regression was used to investigate effect of scan category (normal or abnormal) and observer fatigue on interpretation times. Experienced radiologists (mean time 10.9 min, SD 5.2) reported significantly faster than less experienced radiologists and technicians; odds ratios of reporting times 1.4 (CI 1.1, 1.8) and 1.6 (1.3, 2.0), respectively (P≤0.001). Experienced and less-experienced radiologists took longer to report abnormal cases; ratio 1.2 (CI 1.1,1.4, P<0.001) and 1.2 (1.0, 1.3, P=0.03), respectively. All groups took 70% as long to report the final five cases as they did with an initial five; ratio 0.7 (CI 0.6 to 0.8), P<0.001. For technicians only, accuracy increased with longer reporting times (P=0.04). Experienced radiologists report faster than do less-experienced observers and proportionally spend less time interpreting normal cases. Technicians who report more slowly are more accurate. All groups reported faster as the study period progressed.

Keywords

CTColonVirtual colonoscopyComputerised tomography

Copyright information

© Springer-Verlag 2006