Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No confluent opacities are identified . There is no pulmonary edema or pleural effusions . No pneumothorax or pneumomediastinum is evident . Cardiomediastinal contours are within normal limits and unchanged from prior . Median sternotomy wires appear intact . A lumbar peritoneal shunt catheter is partially imaged in the left upper quadrant . Surgical clips are visualized in the right upper quadrant .
    OUTPUT:
    
No acute cardiopulmonary process . No evidence of pneumonia .