Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , but clear . No confluent opacity is identified . There is no pneumothorax . No pulmonary edema or pleural effusions are identified . Cardiomediastinal and hilar contours are within normal limits . Small amount of air is visualized within the stomach below the left hemidiaphragm .
    OUTPUT:
    
Low lung volumes , though no acute cardiopulmonary process .