Effect of Directed Training on Reader Performance for CT Colonography: Multicenter study

Files in This Item:
File Description SizeFormat 
radiol_2006_Effect_directed_training_on_reader_performance_CTC.pdf490.19 kBAdobe PDFDownload
Title: Effect of Directed Training on Reader Performance for CT Colonography: Multicenter study
Authors: European Society of Gastrointestinal and Abdominal Radiology CT Colongraphy Study Group Investigators
Fenlon, Helen M.
Foley, Shane J.
et al.
Permanent link: http://hdl.handle.net/10197/7489
Date: Jan-2007
Online since: 2016-02-11T14:58:23Z
Abstract: Purpose: 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. On average, no difference between trained radiologists and trained technologists was found; however, individual performance was variable and some trainees outperformed some experienced observers.
Type of material: Journal Article
Publisher: Radiological Society of North America
Journal: Radiology
Volume: 242
Issue: 1
Start page: 152
End page: 161
Copyright (published version): 2007 RSNA
Keywords: Computed tomography (CT)Interpretive performanceRadiologyTraining
DOI: 10.1148/radiol.2421051000
Language: en
Status of Item: Peer reviewed
Appears in Collections:Medicine Research Collection

Show full item record

Citations 5

Last Week
Last month
checked on Feb 11, 2019

Download(s) 50

checked on May 25, 2018

Google ScholarTM



This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.