Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . Heart size is top . Aorta is slightly unfolded . Mediastinal and hilar contours are unremarkable . Streaky atelectasis is noted in the left lung base . No focal consolidation , pleural effusion or pneumothorax is clearly seen . No radiopaque foreign body is present within the thorax . There is no subdiaphragmatic gas .
    OUTPUT:
    
Left basilar atelectasis . No radiopaque foreign body identified .