Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well inflated with retrocardiac atelectasis . No pulmonary edema . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable .
    OUTPUT:
    
1 . No pulmonary edema . 2 . Retrocardiac atelectasis .