Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Lung volumes are low which limits evaluation . Bronchovascular crowding atelectasis likely accounts for subtle increased opacity in the lower lungs . There is no convincing evidence of pneumonia . No large effusion or pneumothorax is seen . The heart size appears grossly stable though suboptimally assessed . Mediastinal contour is normal . Bony structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Limited , negative .