Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views the chest were provided the patient positioned upright . Lung volumes are markedly low with scattered subsegmental atelectasis . Please note , on concurrently performed CT abdomen pelvis , filling defects are noted within the pulmonary arterial tree . Heart size is difficult to assess . Mediastinal contour appears grossly unremarkable . No large pneumothorax is seen . No large effusion . No free air below the right hemidiaphragm . Right humeral head replacement is noted .
    OUTPUT:
    
Low lung volumes with scattered atelectasis . Please refer to concurrently performed CT abdomen pelvis regarding findings of pulmonary emboli .