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Title: The assessment of stroke multidimensional CT and MR imaging using eye movement analysis: does modality preference enhance observer performance?
Authors: Cooper, Lindsey
Gale, Alastair G.
Saada, Janak
Gedela, Swamy
Scott, Hazel J.
Toms, Andoni
Keywords: Observer performance
Image perception
Stroke
Eye-tracking
Expertise
CT
MRI
Issue Date: 2010
Publisher: © 2010 Society of Photo-Optical Instrumentation Engineers
Citation: COOPER, L. ... et al., 2010. The assessment of stroke multidimensional CT and MR imaging using eye movement analysis: does modality preference enhance observer performance? IN: Manning, D.J. and Abbey, C.K. (eds.). Medical Imaging 2010: Image Perception, Observer Performance, and Technology Assessment, Proceedings of SPIE, 7627,76270B.
Abstract: Although CT and MR imaging is now commonplace in the radiology department, few studies have examined complex interpretative tasks such as the reading of multidimensional brain CT or MRI scans from the observer performance perspective, especially with reference to Stroke. Modality performance studies have demonstrated a similar sensitivity of less than 50% for both conventional modalities, with neither modality proving superior to the other in Stroke observer performance tasks (Mohr, 1995; Lansberg, 2000; Wintermark, 2007). Visual search studies have not extensively explored stroke imaging and an in-depth, comparative eye-movement study between CT and MRI has not yet been conducted. A computer-based, eye-tracking study was designed to assess diagnostic accuracy and interpretation in stroke CT and MR imagery. Forty eight predetermined clinical cases, with five images per case, were presented to participants (novices, trainees and radiologists; n=28). The presence or absence of abnormalities was rated on a four-point Likert scale and their locations reported. Results highlight differences in visual search patterns amongst novice, trainee and expert observers; the most marked differences occurred between novice readers and experts. In terms of modality differences; novice and expert readers spent longer appraising CT images than MR, compared with trainees, who spent longer appraising MR than CT images. Image analysis trends did not appear to differ between modalities, but time spent within clinical images, accuracy and relative confidence performing the task did differ between CT and MR reader groups. To-date few studies have explored observer performance in neuroradiology and the present study examines multi-slice image appraisal by comparing matched pairs of CT and MRI Stroke cases.
Description: Copyright 2010 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. This paper can also be found at: http://dx.doi.org/10.1117/12.843680
Version: Published
DOI: 10.1117/12.843680
URI: https://dspace.lboro.ac.uk/2134/6283
Publisher Link: http://dx.doi.org/10.1117/12.843680
ISBN: 9780819480286
ISSN: 1605-7422
Appears in Collections:Conference Papers (Computer Science)

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