Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pectoral dual lead pacemaker in situ with the tip seen in the right antrum and right ventricle . Cardiomegaly unchanged . NG tube in situ coursing out of sight . No pleural effusion . No pulmonary edema . No pneumothorax . 23 mm wide oval density projecting over the peripheral aspect of the right lower lung and the anterior fifth rib is is most likely external .
    OUTPUT:
    
Normal postoperative appearance .