Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears moderately enlarged with a large hiatal hernia present . Diffuse calcification of the thoracic aorta is noted . There is mild to moderate pulmonary edema noted with perivascular indistinctness , upper zone vascular redistribution , and perihilar haziness . There is likely a trace right pleural effusion . Patchy opacities in lung bases may reflect atelectasis . No large pneumothorax is detected . Multilevel moderate degenerative changes are seen within the imaged thoracolumbar spine .
    OUTPUT:
    
Mild to moderate pulmonary edema with probable trace right pleural effusion . Large hiatal hernia with bibasilar patchy opacities , potentially atelectasis , however infection or aspiration can not be completely excluded .