Abstract

Forty conventional radiographs with examples of mild interstitial infiltrates and subtle pneumothoraces and 40 normal studies of the chest were selected and digitized, with pixel sizes of 1.0, 0.5, 0.2, and 0.1 mm. Observer performance tests were carried out using receiver operating characteristic analysis. Conventional radiographs and digitized images were compared. The results indicate that, in such cases, diagnostic accuracy increases significantly as the pixel size is reduced, at least to the 0.1-mm level. We conclude that, for digital systems using screen-film or similar image receptors, use of a pixel size substantially larger than 0.1 mm may result in some loss of diagnostic accuracy.

Keywords

MedicineRadiographyPixelReceiver operating characteristicDigital radiographyNuclear medicineObserver (physics)Diagnostic accuracyRadiologyArtificial intelligenceInternal medicine

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Publication Info

Year
1986
Type
article
Volume
158
Issue
1
Pages
21-26
Citations
149
Access
Closed

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Heber MacMahon, Carl J. Vyborny, C.E. Metz et al. (1986). Digital radiography of subtle pulmonary abnormalities: an ROC study of the effect of pixel size on observer performance.. Radiology , 158 (1) , 21-26. https://doi.org/10.1148/radiology.158.1.3940383

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DOI
10.1148/radiology.158.1.3940383