Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , with flattening of the diaphragms and increased AP diameter , consistent with chronic obstructive pulmonary disease . No focal consolidation is seen . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal to mildly enlarged . The aortic knob is slightly prominent , which could be due to tortuosity , although underlying mild aortic dilatation is not excluded and could be further evaluated for on nonurgent chest CT .
    OUTPUT:
    
No focal consolidation . No overt pulmonary edema . The aortic knob is slightly prominent , which could be due to tortuosity , although underlying mild aortic dilatation is not excluded and could be further evaluated for on nonurgent chest CT .