Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest was obtained . Bibasilar atelectasis or scarring . Otherwise , the lungs are clear bilaterally with no evidence of focal consolidation or pulmonary edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . There is no free air below the diaphragm .
    OUTPUT:
    
No acute intrathoracic process . No free air below the diaphragm .