Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right internal jugular central venous catheter tip terminates at the junction of the SVC and right atrium . Endotracheal tube terminates approximately 6 cm from the carina . An enteric tube tip is within the stomach . Heart size is normal . Aortic knob is diffusely calcified . Mediastinal and hilar contours are unremarkable . Interstitial opacities are seen within the left upper lung field , findings which could reflect chronic changes . Similarly , linear opacities within both lung bases may reflect scarring or perhaps subsegmental atelectasis . No focal consolidation , large pleural effusion or large pneumothorax is detected on this supine exam . Multiple fractures are seen involving the ribs bilaterally , left clavicle , and left proximal humerus , all which appear chronic .
    OUTPUT:
    
1 . Standard positioning of all lines and tubes . 2 . Probable chronic changes within the left upper lobe and scarring and / or subsegmental atelectasis involving the lung bases .