Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal . There is no focal consolidation , effusion or pneumothorax . No central vascular congestion or overt pulmonary edema . Mild tortuosity of the descending aorta . Mild calcification at the aortic knob . Heart size is top - normal , unchanged . Known large hiatal hernia .
    OUTPUT:
    
No evidence of pneumonia .