Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with 1 day earlier , the cardiomediastinal silhouette is unchanged . Elevation of the right hemidiaphragm is again noted , similar to prior . Prominence of the right hilum and surrounding perihilar region appears slightly more pronounced . This is not fully characterized , but the differential diagnosis includes a pneumonic infiltrate . There is new subtle hazy opacity at the right lung base , question due to the increased atelectasis . There is upper zone redistribution and mild vascular plethora equivocally increased . No gross effusion . Small effusions seen posteriorly on the lateral view from the prior study would likely not be well demonstrated on this AP examination . No pneumothorax detected .
    OUTPUT:
    
1 . New hazy opacity at the right base , question increasing atelectasis . 2 . Known small effusions are not well depicted on this AP view . 3 . Right perihilar opacity , question related to pneumonia , is very slightly more pronounced . 4 . Upper zone redistribution and mild vascular plethora is similar , question slightly more pronounced .