Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly is unchanged . The aortic knob remains calcified . Mediastinal and hilar contours are similar . Moderate size left pleural effusion appears minimally increased compared to the prior study . Opacification of the left lung base likely is due to compressive atelectasis . Mild pulmonary vascular congestion appears similar . Trace right pleural effusion is relatively unchanged . No pneumothorax is identified .
    OUTPUT:
    
Slight interval increase in size of moderate left pleural effusion . Left basilar opacity likely reflects atelectasis . Trace right pleural effusion also noted . Mild pulmonary vascular congestion , similar compared to the prior study .