Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is again mild to moderately enlarged . The mediastinal and hilar contours appear stable . The lung volumes are low . Patchy opacity obscuring the left costophrenic angle is probably due to atelectasis rather than pneumonia or pleural effusion . No pneumothorax is evident . Pulmonary vessels are relatively enlarged but well defined , perhaps with upper zone re-distribution , although probably unchanged and suggesting at most mild venous hypertension .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .