Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and grossly clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax . A left chest port terminates in the proximal right atrium . There is no free air under the diaphragm . Mild elevation of the right hemidiaphragm is probably unchanged compared with ___ .
    OUTPUT:
    
No free air under the diaphragm . No acute pulmonary process identified .