Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright view of the chest and upper abdomen . No prior . Relatively low lung volumes are seen . The lungs , however , are grossly clear . The cardiomediastinal silhouette is within normal limits given low inspiratory effort . No acute osseous abnormality identified . No free air is seen below the diaphragm .
    OUTPUT:
    
No definite acute cardiopulmonary process . No free intraperitoneal air .