Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are relatively well expanded and clear . The cardiomediastinal silhouette is unremarkable . The hilar and pleural surfaces are normal . Surgical material is noted within the left upper quadrant and right upper quadrant of the abdomen . There is no evidence of subdiaphragmatic free air .
    OUTPUT:
    
No acute cardiopulmonary process or subdiaphragmatic free air .