Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable AP chest radiograph is obtained . The right hemidiaphragm remains elevated . The lungs are clear without focal consolidation , nodule , effusion , or pneumothorax . The heart and mediastinal contours are normal . Calcifications of the tracheobronchial tree are noted .
    OUTPUT:
    
No acute cardiopulmonary process .