Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , but no focal consolidation is seen . Relative crowding of the bronchovascular structures is likely secondary to low volumes . The cardiomediastinal silhouette is normal . There is no evidence of pneumomediastinum . There is no evidence of intra-abdominal free air on this seated upright view . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary abnormality .