Time-dependent observer errors in pulmonary nodule detection

Manning, David, Barker-Mill, Susan and Donovan, Tim (2006) Time-dependent observer errors in pulmonary nodule detection. The British Journal of Radiography, 79 (940). pp. 342-346. Full text not available from this repository.

Official URL: http://bjr.birjournals.org/cgi/content/full/79/940...


The work was carried out to investigate differences in visual search characteristics between groups of
observers with different levels of experience in the task of pulmonary nodule detection in chest radiology and we
report here on these differences in respect of time related decisions. Volunteer observers were divided into three
groups depending on their level of expertise. There were eight radiologists, eight radiographers and eight
novices. Their task was to detect pulmonary nodules in a test bank of 120 digitized posteroanterior (PA) chest
radiographs. Five of the eight radiographers were tested twice: once before and once after a 6-month training
programme in interpretation of the adult chest radiograph. During each test session the observers’ eye
movements were tracked. Data on the observers’ decisions through Alternate Free Response Operating
Characteristic (AFROC) methodology were correlated to their eye-movement and fixation patterns. True
negative decisions from all observers were associated with shorter fixation times than false negative decisions.
No correct negative decisions were made after fixations exceeding 3 s.

Item Type: Article
Journal or Publication Title: The British Journal of Radiography
Publisher: The British Institute of Radiology
ISSN: Online: 1748-880X
Related URL(s):
Departments: Faculty of Health and Science > Medical and Sports Sciences > Health and Medical Sciences
Depositing User: Insight Administrator
Date Deposited: 07 May 2010 16:10
Last Modified: 26 Aug 2016 16:08
URI: http://insight.cumbria.ac.uk/id/eprint/167

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