Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left anterior chest wall dual lead pacer is unchanged . Coronary artery stent is unchanged . Heart remains mildly enlarged . Aortic knob calcifications are noted . Hilar contours are unremarkable . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .