Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung vollumes seen with crowding of the bronchovascular markings . There are no focal pulmonary opacities or edema . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . No subdiaphragmatic free air is identified .
    OUTPUT:
    
No clear evidence of acute cardiopulmonary process .