Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , with crowding of bronchovascular markings . There is mild left lower lobe atelectasis , but no focal consolidation . Heart size is top normal . Note is made of prominent azygos vein . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary process .