Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung opacity from moderate posteriorly layering pleural effusion and left lower lung atelectasis reflected by increased retrocardiac density is unchanged . Pulmonary vascular congestion has improved . Heart size , mediastinal and hilar contours are normal .
    OUTPUT:
    
Left sided moderate , posteriorly layering pleural effusion and left lower lung atelectasis is unchanged since yesterday . Pulmonary vascular congestion has significantly improved .