Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there is redemonstration of a moderate sized left pleural effusion , not significantly changed . There is overlying atelectasis . There is probable atelectasis at the right lung base . The heart is top - normal in size . The mediastinal contours are normal . There is mild pulmonary vascular congestion .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion . 2 . Moderate left - sided pleural effusion , not significantly changed since prior examination with overlying atelectasis .