Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no focal consolidation or pneumothorax . There is no vascular congestion or pleural effusions . Mediastinal and hilar contours are within normal limits . Apparent increase in the size of the cardiac silhouette is likely exaggerated due to low lung volumes . However , the cardiac silhouette is mildly enlarged and may reflect cardiomegaly or a pericardial effusion .
    OUTPUT:
    
1 . Mildly enlarged cardiac silhouette , possible mild cardiomegaly or a pericardial effusion . 2 . No other acute cardiopulmonary process .