Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The lungs are clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable . Left central line terminates in the right atrium . Median sternotomy wires and mediastinal clips are noted . A calcified lymph node is noted in the AP window .
    OUTPUT:
    
No acute cardiopulmonary process .