The effect of image display size on observer performance an assessment of variance components

David Gur; Amy H Klym; Jill L King; Glenn S Maitz; Claudia Mello-Thoms; Howard E Rockette; F Leland Thaete

doi:10.1016/j.acra.2005.11.033

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The effect of image display size on observer performance an assessment of variance components

Journal article

Peer reviewed

The effect of image display size on observer performance an assessment of variance components

David Gur, Amy H Klym, Jill L King, Glenn S Maitz, Claudia Mello-Thoms, Howard E Rockette and F Leland Thaete

Academic radiology, Vol.13(4), pp.409-413

04/2006

DOI: 10.1016/j.acra.2005.11.033

PMID: 16554219

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Abstract

Our goal was to investigate the effect of the displayed image size on variance components during the performance of an observer performance study to detect masses on abdominal computed tomography (CT) examinations. A previously performed receiver operating characteristic (ROC) study with eight observers to detect abdominal masses on 166 CT examinations was reanalyzed to assess variance components when comparing two similar modes with displayed image sizes varying by a factor of 2. Case, mode, and reader-related variance components were estimated for the group of eight observers and subsets of readers after excluding each of the participants. There was no significant difference in the average area under the ROC curves between the two modes using the two image sizes (P > .05). Reader and reader-by-case variability were substantially larger for the mode displaying enlarged images for the group and all subsets formed by excluding a single reader. Reader variability was affected by one observer who actually performed better with the enlarged images. Sequential viewing of enlarged CT images for the detection of abdominal masses did not improve performance and increased reader variability.

Radiography, Thoracic - statistics & numerical data

User-Computer Interface

Abdominal Neoplasms - diagnostic imaging

Reproducibility of Results

Humans

Image Interpretation, Computer-Assisted - methods

Diagnostic Imaging - methods

Algorithms

Analysis of Variance

Sensitivity and Specificity

Abdominal Neoplasms - epidemiology

Visual Perception

Image Enhancement - methods

Data Display

Task Performance and Analysis

Observer Variation

Details

Title: Subtitle: The effect of image display size on observer performance an assessment of variance components
Creators: David Gur - Department of Radiology, School of Medicine, Imaging Research, Suite 4200 Magee-Womens Hospital, 300 Halket Street, Pittsburgh, PA 15261, USA. gurd@upmc.edu
Amy H Klym
Jill L King
Glenn S Maitz
Claudia Mello-Thoms
Howard E Rockette
F Leland Thaete
Resource Type: Journal article
Publication Details: Academic radiology, Vol.13(4), pp.409-413
Publisher: United States
DOI: 10.1016/j.acra.2005.11.033
PMID: 16554219
ISSN: 1076-6332
eISSN: 1878-4046
Grant note: EB002106 / NIBIB NIH HHS EB001694 / NIBIB NIH HHS
Language: English
Date published: 04/2006
Academic Unit: Roy J. Carver Department of Biomedical Engineering; Radiology
Record Identifier: 9984051773102771

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