Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lung volumes are low . There is a probable mild bibasilar atelectasis . The mid upper lungs are well aerated . The heart size can not be assessed . The mediastinal contour stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Limited study given low lung volumes without acute intrathoracic process .