Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates in the lower superior vena cava . The cardiac , mediastinal and hilar contours appear unchanged . There is persistent opacity of reticular character with prior bronchial cuffing and probably mild volume loss within the right lower lobe , but this was the case before and appears less severe . An area of right mid lung scarring and nodular appears unchanged . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Persistent but improved right basilar opacity , which may indicate residual scarring from prior infection , although recurring infection at the same site as before is not excluded .