Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded and show mild bilateral interstitial opacities with a more confluent left lower lobe opacity on the frontal view . The cardiac silhouette is enlarged . The mediastinal silhouette is normal . There are small bilateral pleural effusions . On the lateral view , the left lower lobe opacity corresponds to a large hiatal hernia .
    OUTPUT:
    
Mild interstitial edema . Mild cardiomegaly . Moderate hiatal hernia .