Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chronic right - sided rib deformities noted . Mild pulmonary edema is seen . No large pleural effusion is seen although a small left pleural effusion is difficult to exclude . The cardiac silhouette is mildly enlarged . The aortic knob is calcified . No pneumothorax is seen .
    OUTPUT:
    
Mild pulmonary edema and mild enlargement of the cardiac silhouette .