Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The trauma board somewhat obscures fine detail at the bases . Within the limitations , there is no focal consolidation . There is mild pulmonary edema . There are also emphysematous changes . There is no pleural effusion or pneumothorax . Allowing for positioning , the cardiomediastinal silhouette is normal . No fracture is identified on this limited supine view .
    OUTPUT:
    
Emphysema and mild pulmonary edema . No evidence of a traumatic injury .