Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is exaggerated by low lung volumes and likely within normal limits . Previous pulmonary edema has cleared . There is no evidence of pneumonia . There is no pleural effusion or pneumothorax . The aortic arch is calcified .
    OUTPUT:
    
Low lung volumes . No evidence of pneumonia .