Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is linear atelectasis at the left lung base . No focal consolidation is identified . The cardiomediastinal silhouette and hilar contours are stable . There is no pleural effusion or pneumothorax . Left chest pacemaker and leads are in unchanged positions .
    OUTPUT:
    
Minimal atelectasis at the left lung base . No focal consolidation .