Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . There is no pleural effusion or pneumothorax . The thoracic aorta is mildly tortuous . There is streaky retrocardiac opacity , not largely changed from ___ , most compatible with atelectasis . No definite focal consolidation seen . Surgical clips noted at the left lung apex . No acute osseous abnormality is seen . Multiple thoracic compression deformities , not significantly changed from ___ .
    OUTPUT:
    
No evidence of pneumonia . Streaky retrocardiac opacity , likely represents atelectasis .