Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is chronic , but has been larger in the past . Mildly increased opacity in the lower lungs bilaterally could reflect an element of pulmonary edema . There is no pleural effusion or pneumothorax . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Mild pulmonary edema . Chronic moderate cardiomegaly .