Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pacemaker leads are in expected position in the right atrium and right ventricle . The lungs are normally . There is scarring or atelectasis at the left costophrenic sulcus . The heart is mildly enlarged , unchanged . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild scarring or atelectasis of the left costophrenic sulcus .