Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are stable , demonstrating a tortuous thoracic aorta . The cardiac silhouette is within normal limits . The bilateral hila are unremarkable . Left brachiocephalic stent is again noted . There are low lung volumes . There is no focal consolidation . There is no evidence pulmonary vascular congestion . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process . Low lung volumes .