Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest . Postoperative changes again seen in the right thoracic cavity . Compared to prior , there appears to be less aerated lung on the right which could be due to enlarging effusion with possible underlying parenchymal abnormality . In addition , there is persistent left basilar opacity not significantly changed given differences in technique . Superiorly , the left lung remains clear . Right PICC and right pleural catheter are again noted .
    OUTPUT:
    
1 . Persistent left basilar opacity , compared to ___ . This could represent atelectasis although infection is not excluded . 2 . Less aerated lung on the right when compared to prior , potentially due to collecting pleural fluid although developing parenchymal abnormalities are also possible .