Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , left pneumothorax and associated left pleural effusion have not substantially changed . Mild pulmonary vascular congestion of the right lung has resolved . Lung volumes are slightly lower compared to the prior . Mild to moderate cardiomegaly .
    OUTPUT:
    
Lung volumes are slightly lower compared to the prior . Stable appearance of the left lung .