Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation , pleural effusion , or pneumothorax is seen . Lung volumes are slightly low . There may be an azygous lobe . Pulmonary vascular prominence is again seen with interval improvement in mild interstitial edema . Heart size is mildly enlarged .
    OUTPUT:
    
Persistent pulmonary vascular prominence with interval improvement in mild interstitial edema .