Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is chronic elevation of the right hemidiaphragm . The lung volumes are low ; however , there is no focal consolidation worrisome for pneumonia . No pleural effusion or pneumothorax . Heart size is normal and there is no evidence for pulmonary edema . Hilar structures are unremarkable . Cervical fusion hardware and abdominal clips are constant . The known pulmonary nodules are better evaluated on the prior CT and are too small to evaluate by radiography .
    OUTPUT:
    
Low lung volumes , without an acute cardiopulmonary process .