Effect of Directed Training on Reader Performance for CT Colonography: Multicenter Study
2007; Radiological Society of North America; Volume: 242; Issue: 1 Linguagem: Inglês
10.1148/radiol.2421051000
ISSN1527-1315
Autores Tópico(s)Pancreatic and Hepatic Oncology Research
ResumoHomeRadiologyVol. 242, No. 1 PreviousNext Original ResearchGastrointestinal ImagingEffect of Directed Training on Reader Performance for CT Colonography: Multicenter StudyAuthor Affiliations1The complete list of investigators and affiliations is listed at the end of this article. Received June 15, 2005; revision requested August 15; revision received February 10, 2006; accepted March 6; final version accepted July 13. Supported by a grant from the European Association of Radiology administered by the European Society of Gastrointestinal and Abdominal Radiology and a Kodak Scholarship administered by the Royal College of Radiologists, United Kingdom.Address correspondence to Steve Halligan, MD, FRCP, FRCR, Department of Radiology, University College London, Level 2 Podium, 235 Euston Rd, London NW1 2BU, England (e-mail: [email protected]).Published Online:Jan 1 2007https://doi.org/10.1148/radiol.2421051000MoreSectionsFull textPDF ToolsImage ViewerAdd to favoritesCiteTrack CitationsPermissionsReprints ShareShare onFacebookTwitterLinked In AbstractPurpose: To define the interpretative performance of radiologists experienced in computed tomographic (CT) colonography and to compare it with that of novice observers who had undergone directed training, with colonoscopy as the reference standard.Materials and Methods: Physicians at each participating center received ethical committee approval and followed the committees' requests regarding informed consent. Nine experienced radiologists, nine trained radiologists, and 10 trained technologists from nine centers read 40 CT colonographic studies selected from a data set of 51 studies and modeled to simulate a population with positive fecal occult blood test results: Studies were obtained in eight patients with cancer, 12 patients with large polyp, four patients with medium polyp, and 27 patients without colonic lesions. Findings were verified with colonoscopy. An experienced radiologist used 50 endoscopically validated studies to train novice observers before they were allowed to participate. Observers used one software platform to read studies over 2 days. Responses were collated and compared with the known diagnostic category for each subject. The number of correctly classified subjects was determined for each observer, and differences between groups were examined with bootstrap analysis.Results: Overall, 28 observers read 1084 studies and detected 121 cancers, 134 large polyps, and 33 medium polyps; 448 healthy subjects were categorized correctly. Experienced radiologists detected 116 lesions; trained radiologists and technologists detected 85 and 87 lesions, respectively. Overall accuracy of experienced observers (74.2%) was significantly better than that of trained radiologists (66.6%) and technologists (63.2%). There was no significant difference (P = .33) between overall accuracy of trained radiologists and that of technologists; however, some trainees reached the mean performance achieved by experienced observers.Conclusion: Experienced observers interpreted CT colonographic images significantly better than did novices trained with 50 studies. 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