Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes resulting crowding of the bronchovascular structures . Mild central pulmonary vascular congestion is noted . There is no focal consolidation , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is unchanged , allowing for differences in technique from the prior examination . There is no free subdiaphragmatic air identified .
    OUTPUT:
    
Low lung volumes and mild pulmonary vascular congestion . No focal consolidation or pleural effusion .