Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is normal . Aorta remains unfolded , and the mediastinal and hilar contours are unchanged . The pulmonary vascularity is not engorged . Minimal streaky opacity within the left lower lobe likely reflects atelectasis . There is no focal consolidation , large pleural effusion or pneumothorax identified . No acute osseous abnormalities detected .
    OUTPUT:
    
Minimal left lower lobe atelectasis .