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Fig. 1B. 48-year-old man with limited systemic sclerosis who underwent
CT to evaluate for interstitial lung disease. Prone axial high-resolution CT
image of lower lung zone at slightly higher level than A shows improved
image quality with less motion artifact compared with A. Note increased
image sharpness and clarity by comparing appearance of right major fissure
(arrow) and vascular margins on both images. Also note resolution of
dependent opacity in right lung, which is diagnostic of transient dependent
atelectasis and excludes early interstitial lung disease as a cause of this
finding. This image was inverted to allow direct comparison with supine axial
image.
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