Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low but clear . There is no focal consolidation . No pneumothorax is identified . There is no vascular congestion or pleural effusions . Cardiomediastinal contours are within normal limits and unchanged from prior . There is no subdiaphragmatic free air .
    OUTPUT:
    
Low lung volumes , though no acute cardiopulmonary process .