Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates in the lower superior vena cava . The patient is status post left shoulder replacement . The lung volumes are low . The cardiac , mediastinal and hilar contours appear stable . A left basilar opacity has cleared . The lungs appear clear . There is no pleural effusion or pneumothorax . No free air is identified .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease or free air .