Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again noted are multiple median sternotomy wires and mediastinal surgical clips in unchanged orientation . There are low lung volumes . The cardiomediastinal contours are stable . The bilateral hila are within normal limits . Aortic arch calcifications are again noted . There is bibasilar atelectasis . Otherwise , the lungs are clear without focal consolidation . There is no evidence of pulmonary vascular congestion or pulmonary edema . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process . Low lung volumes .