Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The heart size is mildly enlarged . The aorta is unfolded . There is mild pulmonary vascular congestion , with small amount of fluid seen within the fissures . Additionally , patchy opacities in the lung bases likely reflect atelectasis . A small left pleural effusion is relatively unchanged compared to prior . No new areas of focal consolidation are present . There is no pneumothorax .
    OUTPUT:
    
Mild pulmonary vascular congestion and small left pleural effusion . Mild bibasilar atelectasis .