Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The aortic arch is calcified . The mediastinal and hilar contours appear unchanged including a convex contour to the right upper mediastinal contour , which is stable and most often associated with tortuosity of the great vessels . There is a new moderate interstitial abnormality most suggestive of interstitial pulmonary edema . The central airways are cuffed . There is probably a trace pleural effusion on each side . Degenerative changes and suspected bony demineralization along the thoracic spine are similar .
    OUTPUT:
    
New moderate interstitial abnormality which suggests pulmonary edema . If clinical findings are discordant , however , then the possibility of atypical infection could be considered in the appropriate clinical setting , although less likely .