Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . There is bibasilar atelectasis . There is slight prominence of the pulmonary vasculature . The cardiac silhouette is top - normal . There is no pleural effusion or pneumothorax . The aortic knob is calcified . There is moderate compression of a lower thoracic vertebral body , as seen previously , not well assessed on this study .
    OUTPUT:
    
Relatively low lung volumes . Prominence of the pulmonary vasculature suggests pulmonary vascular congestion . Bibasilar atelectasis .