title: Evaluation of a standardized CT colonography training program for novice readers.
abstract: OBJECTIVE
  To determine how many computed tomographic (CT) colonography training studies have to be evaluated by novice readers to obtain an adequate level of competence in polyp detection.
  
  
  METHODS
  The study was approved by the Institutional Review Board. Informed consent was obtained from all participants. Six physicians (one radiologist, three radiology residents, two researchers) and three technicians completed a CT colonography training program. Two hundred CT colonographic examinations with colonoscopic verification were selected from a research database, with 100 CT colonographic examinations with at least one polyp 6 mm or larger. After a lecture session and short individual hands-on training, CT colonography training was done individually with immediate feedback of colonoscopy outcome. Per-polyp sensitivity was calculated for four sets of 50 CT colonographic examinations for lesions 6 mm or larger. By using logistic regression analyses, the number of CT colonographic examinations to reach 90% sensitivity for lesions 6 mm or larger was estimated. Reading times were registered.
  
  
  RESULTS
  The average per-polyp sensitivity for lesions 6 mm or larger was 76% (207 of 270) in the first set of 50 CT colonographic examinations, 77% (262 of 342) in the second (P = .96 vs first set), 80% (310 of 387) in the third (P = .67 vs first set), and 91% (261 of 288) in the fourth (P = .018). The estimated number of CT colonographic examinations for a sufficient sensitivity was 164. Six of nine readers reached this level of competence within 175 CT colonographic examinations. Reading times decreased significantly from the first to the second set of 50 CT colonographic examinations for six readers.
  
  
  CONCLUSIONS
  Novice CT colonography readers obtained sensitivity equal to that of experienced readers after practicing on average 164 CT colonographic studies.
authors.affiliation: Department of Radiology and Clinical Epidemiology and Biostatistics, Academic Medical Center Amsterdam, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands. m.h.liedenbaum@amc.uva.nl
authors.forename: Marjolein H
authors.initials: MH
authors.lastname: Liedenbaum
authors.forename: Shandra
authors.initials: S
authors.lastname: Bipat
authors.forename: Patrick M M
authors.initials: PM
authors.lastname: Bossuyt
authors.forename: Roy S
authors.initials: RS
authors.lastname: Dwarkasing
authors.forename: Margriet C
authors.initials: MC
authors.lastname: de Haan
authors.forename: Roel J
authors.initials: RJ
authors.lastname: Jansen
authors.forename: Dominique
authors.initials: D
authors.lastname: Kauffman
authors.forename: Christiaan
authors.initials: C
authors.lastname: van der Leij
authors.forename: Manou S
authors.initials: MS
authors.lastname: de Lijster
authors.forename: Cindy C
authors.initials: CC
authors.lastname: Lute
authors.forename: Marije P
authors.initials: MP
authors.lastname: van der Paardt
authors.forename: Maarten G
authors.initials: MG
authors.lastname: Thomeer
authors.forename: Ijsbrand A
authors.initials: IA
authors.lastname: Zijlstra
authors.forename: Jaap
authors.initials: J
authors.lastname: Stoker
mesh_terms: D002983:Clinical Competence; D003111:Colonic Polyps / Q000000981:diagnostic imaging*; D023881:Colonography, Computed Tomographic / Q000592:standards*; D003113:Colonoscopy; D006801:Humans; D007318:Inservice Training; D016015:Logistic Models; D015397:Program Evaluation; D011871:Radiology / Q000193:education*; D012680:Sensitivity and Specificity