Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is enlarged with a globular configuration suggestive of a pericardial effusion . Pulmonary vascularity is normal . Lungs are clear except for minimal linear atelectasis at the bases no pleural effusion or pneumothorax . .
    OUTPUT:
    
Globular and enlarged cardiac silhouette is suspicious for , but not diagnostic of , a pericardial effusion . Correlation with echocardiography may be helpful .