Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from earlier today , the cardiac silhouette remains enlarged . Diffuse bilateral opacities could represent pulmonary edema , however underlying pneumonia can not be excluded . There is no large pleural effusion . There is no pneumothorax . Surgical clips are seen overlying the cardiac silhouette and note is made of sternotomy wires . Widening of the AC joint on the right likely represents a chronic finding .
    OUTPUT:
    
Diffuse bilateral opacities could reflect pulmonary edema , however underlying pneumonia can not be excluded .