Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Artifact from trauma board is present . The lung volumes are low , accounting for some bronchovascular crowding , but there is no focal consolidation . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Although this study is limited for assessment of osseous structures , there is no evidence of rib fracture .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Low lung volumes .