Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are somewhat low . No focal opacities . No pleural effusion or pneumothorax . Heart size is normal . Cardiomediastinal hilar silhouettes are unremarkable . A central venous line terminates in the mid to lower SVC .
    OUTPUT:
    
1 . A central venous catheter terminates in the mid to lower SVC . No pneumothorax . 2 . No acute cardiopulmonary abnormality .