Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is unchanged . The aortic knob is calcified . The mediastinal contours are stable . Mild pulmonary edema is present . Prominent left epicardial fat pad is noted , as seen on prior exams , though a small left pleural effusion can not be excluded . Bibasilar opacities may reflect atelectasis though infection is not excluded . There is no pneumothorax . Evaluation the lateral view is limited due to the patient 's inability to raise her arms .
    OUTPUT:
    
Mild pulmonary edema . Bibasilar airspace opacities may reflect atelectasis though infection or aspiration can not be excluded . Prominent left epicardial fat pad ; small left pleural effusion may be present .