Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi upright portable AP view the chest . Lung volumes are markedly low . There is no large consolidation or definite signs of effusion or pneumothorax . The heart size can not be assessed . Mediastinal contour appears grossly unremarkable allowing for slight leftward rotation . No acute osseous injury is detected .
    OUTPUT:
    
Limited , negative .