Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are stable . Mild bibasilar atelectasis is noted . Lungs are otherwise clear . There is no pleural effusion or pneumothorax . A left internal jugular central venous catheter is unchanged in position with the tip projecting over the brachiocephalic confluence .
    OUTPUT:
    
No acute cardiopulmonary process , specifically no evidence of pneumonia .