Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . A left - sided subclavian central line is again noted ending at the level of the mid SVC in unchanged position compared with prior exam .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .