Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes and AP technique accentuate the cardiac silhouette and pulmonary vasculature . Heart size is moderately enlarged with prominent unfolding of the thoracic aorta . Several calcified mediastinal and hilar lymph nodes suggestive of prior granulomatous disease . Moderate atherosclerotic calcification of the aortic knob . Pleural surfaces are clear without effusion or pneumothorax . No pulmonary edema or focal airspace consolidation . No obvious traumatic findings .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary abnormality .