Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No confluent opacity is identified . There is no pulmonary edema or pleural effusions . No pneumothorax is evident . Cardiomediastinal and hilar contours are within normal limits and unchanged from prior . Mild elevation of the left hemidiaphragm is unchanged .
    OUTPUT:
    
No acute cardiac or pulmonary process . No evidence of aspiration .