Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , bibasilar atelectasis and retrocardiac opacity have improved . Lung volumes remain low . There is no focal consolidation . Probable trace bilateral effusions persist . No pneumothorax . Mediastinal and hilar contours are stable . Heart is top - normal in size , stable .
    OUTPUT:
    
1 . No evidence of pneumonia . Improved bibasilar atelectasis and retrocardiac opacity . 2 . Stable top - normal heart size .