Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right PICC tip projects over the expected region of the proximal right atrium , unchanged . Small left pleural effusion with compressive atelectasis . Tiny right pleural effusion with compressive atelectasis . Lung volumes have slightly improved . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Slightly improved lung volumes with persistent left greater than right pleural effusions .