Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided effusion has significantly decreased as well as the fluid along the minor fissure . The left pleural effusion has also decreased . There is persistent left retrocardiac opacity which could represent atelectasis / consolidation . The pulmonary vascular congestion is compared well . Pneumothorax . Stable enlargement of the cardiac silhouette .
    OUTPUT:
    
Interval decrease in bilateral pleural effusions and improved left retrocardiac opacity likely atelectasis .