Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , lung volumes remain low , with a small right pleural effusion . Vascular congestion has slightly improved . No new focal consolidation or pneumothorax . There is subtle interstitial abnormality , better assessed on CT chest on ___ . Stable postop changes in the right lung . The cardiac and mediastinal silhouettes are unchanged .
    OUTPUT:
    
Slight improvement in vascular congestion , with continued low lung volumes and small right pleural effusion .