Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged . The aortic knob is calcified . Mediastinal contours are unchanged , with mild pulmonary edema noted . Small bilateral pleural effusions , left greater than right are present , with bibasilar airspace opacities most pronounced in the retrocardiac region , possibly reflecting atelectasis . Infection however is not excluded . There is no pneumothorax . Central venous catheter tip courses cephalad from the IVC , and terminates in the right atrium .
    OUTPUT:
    
Mild pulmonary edema with small bilateral pleural effusions . Bibasilar airspace opacities could reflect atelectasis though infection is not excluded .