Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a focal opacity in the right upper lobe . There is background mild to moderate pulmonary edema , but improved since prior study , especially in the perihilar region . There are bilateral small to moderate pleural effusions , right greater than left . The cardiac silhouette remains moderately enlarged . A tracheostomy tube is in unchanged position terminating 4 .6 cm above the carina . There is no pneumothorax .
    OUTPUT:
    
1 . Interval improvement in pulmonary edema but there is a more focal confluent opacity in the right upper lobe which may represent an infectious process in the appropriate clinical setting . 2 . Bilateral small to moderate pleural effusions , right greater than left . Moderate cardiomegaly .