Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the prior radiograph performed yesterday morning , there is interval enlargement of an area of opacification in the right perihilar region , which most likely represents worsening pulmonary edema . However , an underlying infection can not be excluded . A small right pleural effusion is noted . There is no pneumothorax . The heart remains enlarged . Atherosclerotic calcifications are noted in the aortic arch .
    OUTPUT:
    
Increased right perihilar opacity most likely represents worsening pulmonary edema , though underlying infection can not be excluded . Recommend follow - up CXR after diuresis to differentiate , if clinically appropriate .