Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal opacities concerning for infection although enlargement of the cardiac silhouette as well as the azygos vein is noted . No large effusions . Stable tortuous aorta . No pneumothorax .
    OUTPUT:
    
Mild cardiomegaly , new since the prior study , and enlargement of the azygos compatible with volume overload without frank pulmonary edema .