Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . There is underlying emphysema without focal consolidation , effusion or pneumothorax . Heart size is difficult to assess though appears grossly within normal limits . The mediastinal contour appears normal . The imaged bony structures are intact .
    OUTPUT:
    
Emphysema without superimposed acute process .