Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is unchanged . There is mild tortuosity of the thoracic aorta . There is no evidence of pneumothorax or pleural effusion . No acute osseous abnormality is seen . Chronic left rib fracture is unchanged . Streaky right basilar opacity , likely representing atelectasis . Multiple thoracic compression deformities are unchanged .
    OUTPUT:
    
No evidence of acute displaced rib fracture or pneumothorax .