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American Journal of Roentgenology, Vol 129, Issue 2, 205-208
Copyright © 1977 by American Roentgen Ray Society

Articles

Effect of size and position on chest lesion detection

CA Kelsey, RD Moseley, BG Brogdon, DG Bhave, and J Hallberg

A test series of radiographs was developed by duplicating normal chest radiographs with superimposed masks containing either a 0.5, 1.0, or 1.5 cm pseudolesion. Nine observers participated in the study. Receiver operating characteristic curves were formed and the responses from radiologists and physicists compared. The accuracy rate for detecting 1.0 and 1.5 cm lesions was 44%; for 0.5 cm lesions, 8%. Lesions located in the upper left quadrant were detected with an accuracy of 56% compared to 29% for those in the lower left quadrant.
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Copyright © 1977 by the American Roentgen Ray Society.