Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , with crowding of bronchovascular markings . There is chronic mild elevation of the left hemidiaphragm . Changes of median sternotomy are noted . Cardiomediastinal silhouette is normal . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .