Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overlying trauma board slightly limits assessment . The patient is status post median sternotomy and valve replacement . Heart size is top normal . The mediastinal contours are unremarkable . The left sulcus appears deep compared to the right , concerning for a pneumothorax . Retrocardiac opacity could reflect atelectasis though infection , aspiration , or contusion is not excluded . The right lung is clear . No right - sided pneumothorax is seen on the supine exam . Multiple clips are demonstrated projecting over the right upper quadrant of the abdomen . Right seventh lateral rib fracture is noted .
    OUTPUT:
    
1 . Deep sulcus sign on the left is concerning for a pneumothorax . Further assessment with CT is recommended . 2 . Retrocardiac opacity may reflect atelectasis though infection , contusion , or aspiration is not excluded . 3 . Right seventh lateral rib fracture .