Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . Medial right lobe base opacity may be due to overlap of vascular structures and low lung volumes it appears improved since the prior study . No definite new focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Low lung volumes . Medial right lung base opacity appears improved . No new focal consolidation seen .