Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , resulting in vascular crowding . There is bibasilar atelectasis . The mediastinum is prominent , likely due to a tortuous aorta and mediastinal fat . There is no pleural effusion or pneumothorax . No obvious focal consolidation is seen to suggest pneumonia .
    OUTPUT:
    
No acute cardiopulmonary process .