Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine AP view of the chest was provided . A pacer pack resides over the right axilla with lead tips extending to the region of the right atrium and right ventricle . The lung volumes are low . Underlying trauma board is in place . There is no large consolidation . Linear atelectasis is noted in the right mid lung . The heart appears normal in size and shape . No large pneumothorax or effusion on this supine film .
    OUTPUT:
    
No acute traumatic injury seen on this limited trauma chest radiograph .