Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are within normal limits and without change . Lungs are overexpanded , but without areas of a lobar or segmental consolidation or atelectasis . A linear focus of scar within the lingula is unchanged . There are no pleural effusions . Note is made of previous right mastectomy .
    OUTPUT:
    
Known CT findings suggestive of pulmonary MAC infection are not well demonstrated radiographically . If warranted clinically , CT could be performed as it is more sensitive than radiographs for detecting bronchiectasis and centrilobular nodules .