Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright frontal and lateral views of the chest were performed portably . Lung volumes are low . No definite consolidation , effusion , or pneumothorax seen . The heart size appears top normal , though this can be partially magnified due to technique . The mediastinal contour is normal . Bony structures are intact .
    OUTPUT:
    
Low lung volumes , no acute findings .