Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits . A paucity of apical vasculature suggests emphysema . There may be a small hiatal hernia . The tracheostomy tube and right IJ central venous catheter in good position .
    OUTPUT:
    
1 . No evidence of acute cardiopulmonary process . 2 . All lines and tubes in good position . 3 . Findings suggestive of emphysema .