Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart is top - normal size given the lung volumes . There is crowding of the bronchovascular structures with probable mild pulmonary vascular congestion . Patchy opacities in lung bases may reflect atelectasis . There are no large pleural effusions or pneumothorax . Right brachiocephalic / subclavian stent is again demonstrated .
    OUTPUT:
    
Low lung volumes which limits assessment of the lung bases . Patchy opacities at the lung bases likely reflect atelectasis . Mild pulmonary vascular congestion .