Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No evidence of pneumonia . There is mild pectus excavatum . Linear atelectatic changes are seen at the left lung base . No pleural effusions or pneumothorax . A right subclavian catheter is unchanged in position . The cardiopericardial silhouette is unremarkable .
    OUTPUT:
    
No evidence of pneumonia . Reviewed with Dr . ___ .