Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left approach central venous catheter terminates at the cavoatrial junction , unchanged from prior . The patient has been extubated in the interval . Lung volumes are low . Previously seen plate - like atelectasis within the lung bases have almost entirely resolved . No new confluent consolidation is identified . There is no pulmonary edema or pleural effusions . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Low lung volumes . No pneumonia or CHF .