Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable radiograph of the chest demonstrates a central venous catheter , terminating in the right ventricle , which should be retracted 9 to 10 cm for appropriate position just above the cavoatrial junction . There is elevation of theright hemidiaphragm . Right mid lung opacity may be due to atelectasis secondary to low lung volume on the right ; however , infection can not be excluded . The left lung is grossly clear . No large pleural effusion or pneumothorax is detected .
    OUTPUT:
    
1 . Right mid lung opacity , possibly atelectasis given low lung volumes , however , infection is not excluded . 2 . Right internal jugular central venous line terminates in right ventricle and should be re-positioned . The above findings were communicated to Dr . ___ by Dr . ___ ___ telephone at ___ , five minutes after discovery .