Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no confluent opacity . There is no pneumothorax or pneumomediastinum . No vascular congestion , edema , or pleural effusions are identified . Cardiomediastinal contours are within normal limits . There is no subdiaphragmatic free air .
    OUTPUT:
    
No acute cardiopulmonary process . No pneumonia .