Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Low lung volumes significantly limit the assessment . The lungs appear grossly clear though volumes are quite low . Heart size can not be assessed . Mediastinal contour appears normal . There is relative prominence of the left pulmonary hilum though may reflect bronchovascular crowding in the setting of poor inspiratory effort . No pneumothorax or large effusion . Bony structures are intact .
    OUTPUT:
    
Evaluation is markedly limited due to low lung volumes . Relative prominence of the left pulmonary hilum could reflect bronchovascular crowding due to low lung volumes . Repeat study is recommended with more optimal inspiratory effort .