Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD is noted with leads terminating in the region of right atrium and right ventricle , unchanged . Heart size is mildly enlarged . Mediastinal hilar contours are unremarkable . Pulmonary vasculature is . Lungs are clear except for subsegmental atelectasis in the right lung base . No focal consolidation , pleural effusion is . Acute osseous abnormalities are seen
    OUTPUT:
    
No acute cardiopulmonary abnormality . AICD leads in unchanged positions .