Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable moderate to severe cardiomegaly with normal vasculature , suggesting possible pericardial effusion or cardiomyopathy . The retrocardiac opacification appears less dense , suggesting improvement of atelectasis or consolidation . There is likely a small to moderate left pleural effusion , and a small right pleural effusion . There is no pulmonary vascular congestion or pneumothorax . There is probably an old , well healed fracture of the left anterior second rib .
    OUTPUT:
    
1 . Slight decrease in retrocardiac opacity , consistent with improving atelectasis or consolidation . 2 . Stable moderate to severe cardiomegaly in the absence of pulmonary vascular congestion , suggestive of pericardial effusion or cardiomyopathy .