Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the right lung , small to moderate right pleural effusion is unchanged . Additional opacity of the right lung base is also similar in appearance , and this may be due to infectious consolidation or layering of the pleural effusion . The left lung is essentially clear . No pneumothorax or pulmonary edema . Stable cardiomegaly . The aortic root stent graft is unchanged in position .
    OUTPUT:
    
1 . Unchanged small - to - moderate right pleural effusion . 2 . The right lung base opacity could be explained by a layering pleural effusion or pneumonia . Correlate clinically with signs of infection .