Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung more volumes are noted with bibasilar opacities which may be due to atelectasis in the setting of low lung volumes . There is enlargement of the cardiac silhouette likely accentuated by poor inspiratory effort with possible superimposed mild cardiomegaly . Elevation of the left hemidiaphragm is noted . Dense atherosclerotic calcifications noted at the aortic arch . Old healed right posterior rib fracture is noted . There is no acute osseous abnormality . No free intraperitoneal air .
    OUTPUT:
    
Bibasilar opacities likely atelectasis , infection is not excluded . No overt pulmonary edema .