Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . A Port - A - Cath terminates in the right atrium . The heart is mildly enlarged . Calcified mediastinal lymph nodes are unchanged . The lung volumes are low . Streaky basilar opacities suggest minor atelectasis . There is no pleural effusion or pneumothorax . Cholecystectomy clips project over the right upper quadrant .
    OUTPUT:
    
Low lung volumes and streaky basilar opacities , most suggestive of minor atelectasis . No definite evidence of acute cardiopulmonary disease .