Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle increased airspace opacity in the right lung base may represent atelectasis or early consolidation . There is no pleural effusion , pulmonary edema , or pneumothorax . The cardiomediastinal contour is normal . A left pectoral dual - chamber pacemaker and its leads project in unchanged position .
    OUTPUT:
    
Subtle right lung base airspace opacity may represent atelectasis or early consolidation .