Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded , show mild interstitial opacities with more confluent left lower lobe opacities . The cardiac silhouette is mildly enlarged . The mediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present . Evaluation is limited due to poor photon penetration .
    OUTPUT:
    
Mild to moderate pulmonary edema .