Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the NG tube is not included in this examination , however is well below the diaphragm . Low lung volumes with significant basal atelectasis , left greater than right has increased . Mild cardiomegaly . No pneumothorax .
    OUTPUT:
    
Worsening bibasal atelectasis . Tip of the NG tube is not visualized , but is below the hemidiaphragm .