Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly enlarged , accentuated by the presence of low lung volumes . The aorta is diffusely calcified . Mediastinal contour is widened superiorly , and this is likely attributable to supine positioning . There are diffuse alveolar opacities , with vascular indistinctness suggestive of moderate pulmonary edema . No pleural effusion or pneumothorax is seen . Extensive degenerative changes of the left glenohumeral joint are noted , with moderate degenerative changes of the right glenohumeral joint also demonstrated . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
Diffuse alveolar opacities bilaterally , which could reflect moderate pulmonary edema , though atypical infection should be considered .