Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low with resultant crowding of bronchovascular structures at the lung bases . There is no focal consolidation , pleural effusion or pneumothorax . The heart is normal in size , and the mediastinal and hilar contours are normal .
    OUTPUT:
    
Low lung volumes with resultant crowding of bronchovascular structures in the lung bases . Remainder of lungs are clear . .