Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . Lung volumes are low . Mediastinal and hilar contours are relatively unchanged . There is mild pulmonary vascular congestion with perihilar haziness , new from the recent study . Small bilateral pleural effusions persist . Bibasilar airspace opacities , more so in the retrocardiac region , appear slightly progressed from the prior study earlier today , either reflecting worsening atelectasis or infection . No pneumothorax is demonstrated .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion , slightly worse in the interval . 2 . Small bilateral pleural effusions . 3 . Bibasilar airspace opacities could reflect atelectasis or infection , and appear slightly increased compared to the prior exam from earlier today .