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Subjective similarity of patterns of diffuse interstitial lung disease on thin-section CT: an observer performance study.

Abstract：

RATIONALE AND OBJECTIVES:The aim of this study was to investigate the subjective similarity for pairs of images with various abnormal patterns of diffuse interstitial lung disease on thin-section computed tomography by experienced radiologists to explore a basis for selecting similar images to assist radiologists' interpretation. MATERIALS AND METHODS:Four major patterns (ground-glass opacity, nodular opacity, reticular opacity, and honeycombing) on thin-section computed tomographic images were identified by at least two of three radiologists. One radiologist manually selected 104 image pairs, in which the images in each pair had the same pattern and were similar in appearance. An additional 208 image pairs were randomly selected and evenly divided among the four patterns. These pairs were then rated for subjective similarity (on a continuous scale ranging from 0 = not similar at all to 1.0 = almost identical) by 12 radiologists. RESULTS:For radiologist-selected pairs, the mean similarity rated by the 12 radiologists was 0.72. For randomly selected pairs, the mean similarity was higher for the same pattern (0.47) than for the varying patterns (0.27) (P < .001), and among the same pattern, the mean similarity was 0.63 for ground-glass opacity, 0.58 for honeycombing, 0.45 for nodular opacity, and 0.32 for reticular opacity. The mean standard deviation for similarity ratings on all pairs given by the 12 radiologists was 0.05 (rang, 0.01-0.09). CONCLUSION:Subjective similarity ratings for pairs of abnormal images can be measured reliably and reproducibly by radiologists and will provide a basis for the selection of similar images to assist radiologists' interpretation.

journal_name

Acad Radiol

journal_title

Academic radiology

authors

Li F,Kumazawa S,Shiraishi J,Li Q,Engelmann R,Caligiuri P,MacMahon H,Doi K

doi

10.1016/j.acra.2008.10.016

subject

Has Abstract

pub_date

2009-04-01 00:00:00

pages

477-85

issue

4

eissn

1076-6332

issn

1878-4046

pii

S1076-6332(08)00678-8

journal_volume

16

pub_type

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