Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size appears moderately enlarged , slightly increased when compared to the prior study . The aorta remains tortuous and mildly calcified . There is likely mild pulmonary vascular congestion . Minimal streaky opacities in the lung bases likely reflect atelectasis , without focal consolidation , pleural effusion or pneumothorax visualized . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion . Minimal bibasilar atelectasis .