Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is mildly enlarged but unchanged . Mediastinal contour is unremarkable . There is mild pulmonary vascular congestion . Patchy bibasilar opacities likely reflect atelectasis . Leftward deviation of the trachea at the level of the thoracic inlet is due to the known thyroid goiter . No pleural effusion or pneumothorax is identified .
    OUTPUT:
    
Mild pulmonary vascular congestion and bibasilar atelectasis .