Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size remains mildly enlarged . The mediastinal and hilar contours are unchanged . Bilateral calcified pleural plaques are re- demonstrated , which limit assessment of the underlying lung parenchyma . There may be slightly increased patchy opacification in the left lung base , which could reflect an area of atelectasis though infection can not be excluded . No pleural effusion or pneumothorax is identified . No pulmonary vascular congestion is present . Compression deformities at the thoracolumbar junction remain unchanged .
    OUTPUT:
    
Patchy opacity in the left lung base may reflect atelectasis though infection is difficult to exclude . Calcified bilateral pleural plaques are compatible with prior asbestos exposure and limit the assessment of the underlying lung parenchyma .