Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette has slightly decreased in size . Mediastinal contours are within normal limits . Lungs are clear . Mild pulmonary edema has improved . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Improved mild pulmonary edema . 2 . No evidence of pneumonia .