Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , but the lungs are clear of focal opacities , pleural effusions or pneumothorax . There has been interval removal of a right IJ central venous line and cardiac pacemaker . The cardiomediastinal silhouette is stable and mildly enlarged .
    OUTPUT:
    
No acute cardiopulmonary process .