Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , cardiomediastinal and hilar silhouettes are unchanged . Interstitial lung markings are slightly increased bilaterally , suggesting mild pulmonary vascular congestion , however there is no new focal consolidation , pleural effusion , or pneumothorax . There may be a small hiatal hernia . Mild right apical lung scarring is unchanged since the prior radiograph .
    OUTPUT:
    
Slightly increased interstitial lung markings suggests mild pulmonary vascular congestion , without focal consolidation or pleural effusion .