Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right basilar opacity is seen which could be due to atelectasis however , infection is not excluded . The left lung is grossly clear . There is no pleural effusion or pneumothorax . The cardiac silhouette is top - normal . Mediastinal contours are unremarkable . There is evidence of free air beneath the right hemidiaphragm . Scattered lucencies projecting over the right superolateral chest , right supraclavicular region , left chest wall including projecting over the left scapula and more inferior , suggest subcutaneous emphysema .
    OUTPUT:
    
Right basilar opacity could be due to atelectasis but infectious process is not excluded . Pneumoperitoneum in this patient postoperative day 1 status post cholecystectomy . Subcutaneous emphysema seen bilaterally may be related to laparoscopy one day prior but extends distant to site of abdominal surgery .