Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior chest radiograph performed earlier on the same date , the right lung base opacity has worsened . Mild to moderate pulmonary vascular congestion persists with mild interstitial edema and a small right pleural effusion . Mild cardiomegaly is again noted .
    OUTPUT:
    
1 . Worsening right lung base opacity , which may represent asymmetrical edema , aspiration , or developing pneumonia . 2 . Persistent mild / moderate pulmonary vascular congestion .