Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pulmonary edema may be minimally worse in the interval . Cardiac , mediastinal , and hilar contours are unchanged . Patchy opacities in the lung bases likely reflect areas of atelectasis , but aspiration or infection is not completely excluded . No pleural effusion or pneumothorax is identified . Clips from prior cholecystectomy are noted in the right upper quadrant .
    OUTPUT:
    
Mild pulmonary edema , minimally worse in the interval . Continued bibasilar patchy opacities , likely atelectasis but aspiration or infection is not excluded .