Low-cost soft-copy display accuracy in the detection of pulmonary nodules by single-exposure dual-energy subtraction: comparison with hard-copy viewing

This study endeavored to clarify the usefulness of single-exposure dual-energy subtraction computed radiography (CR) of the chest and the ability of soft-copy images to detect low-contrast simulated pulmonary nodules. Conventional and bone-subtracted CR images of 25 chest phantom image sets with a l...

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Bibliographic Details
Published in:Journal of digital imaging 2000-02, Vol.13 (1), p.33-37
Main Authors: Kido, S, Kuriyama, K, Hosomi, N, Inoue, E, Kuroda, C, Horai, T
Format: Article
Language:English
Subjects:
Cardiology
Diagnostic radiography
Humans
Lung - diagnostic imaging
Lung Neoplasms - diagnostic imaging
Phantoms, Imaging
Radiographic Image Enhancement
Solitary Pulmonary Nodule - diagnostic imaging
Subtraction Technique
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Summary:This study endeavored to clarify the usefulness of single-exposure dual-energy subtraction computed radiography (CR) of the chest and the ability of soft-copy images to detect low-contrast simulated pulmonary nodules. Conventional and bone-subtracted CR images of 25 chest phantom image sets with a low-contrast nylon nodule and 25 without a nodule were interpreted by 12 observers (6 radiologists, 6 chest physicians) who rated each on a continuous confidence scale and marked the position of the nodule if one was present. Hard-copy images were 7 x 7-inch laser-printed CR films, and soft-copy images were displayed on a 21-inch noninterlaced color CRT monitor with an optimized dynamic range. Soft-copy images were adjusted to the same size as hard-copy images and were viewed under darkened illumination in the reading room. No significant differences were found between hard- and soft-copy images. In conclusion, the soft-copy images were found to be useful in detecting low-contrast simulated pulmonary nodules.
ISSN:0897-1889
1618-727X
DOI:10.1007/BF03168338