Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Enlargement of the cardiac silhouette may reflect cardiomegaly or pericardial effusion . Lung volumes are low . No pulmonary edema . No airspace consolidation . No pleural effusions . Spondylotic changes of the thoracic spine .
    OUTPUT:
    
Enlarged cardiac silhouette could reflect cardiomegaly or pericardial effusion . No pulmonary edema . No pneumonia .