Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single view of the chest was obtained . Overlying trauma board obscures detailed evaluation . Lung volumes are extremely low , causing bronchovascular crowding . No focal consolidation or pleural effusion . The heart size and cardiomediastinal contours are normal . No displaced rib fracture is visualized .
    OUTPUT:
    
Very low lung volumes . No evidence of acute cardiopulmonary process .