Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Aortic knob calcifications are unchanged . There are slightly low lung volumes . Heart size is top normal and stable . No focal consolidation is seen . There is no evidence of pleural effusion or pneumothorax . The mediastinal contours are normal .
    OUTPUT:
    
No evidence of pneumonia . No evidence of acute cardiopulmonary process .