Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs . Tracheostomy tube is in appropriate position . A left - sided Port - A - Cath tip is in the right atrium . The lungs are clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No acute cardiopulmonary process .