Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mildly enlarged . The aortic knob is calcified . There is mild pulmonary edema with small bilateral pleural effusions , larger on the left . More focal opacity in the left lung base could reflect atelectasis , but pneumonia is not excluded . No pneumothorax is present . No acute osseous abnormalities detected .
    OUTPUT:
    
Mild pulmonary edema with small bilateral pleural effusions , larger on the left . More focal left basilar opacity could reflect atelectasis but infection is not excluded .