Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP view of the chest was obtained . Cardiomediastinal silhouette is again notable for mild cardiomegaly . Lungs are symmetrically expanded and clear . Pulmonary vasculature is within normal limits . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No evidence of pneumonia or pulmonary edema . 2 . Mild cardiomegaly , as before .