Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ chest radiograph , perihilar edema has resolved . Heart size is normal . Lungs are clear except for minor atelectasis at the left lung base and an improving patchy opacity at the right lung base . Bilateral small pleural effusions are also demonstrated .
    OUTPUT:
    
1 . Resolution of perihilar edema . 2 . Slight improvement in patchy right infrahilar opacity , which may be due to atelectasis or pneumonia . 3 . Small bilateral pleural effusions .