Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided chest wall pacemaker appears in unchanged position , with 2 leads terminating in the right ventricle and 1 lead terminating in the right atrium . There is mild cardiomegaly , stable as compared to prior examination . There is redemonstration of prominent interstitial markings and mild hilar engorgement , which could be secondary to mild pulmonary edema . No new focal consolidation concerning for pneumonia . There is no large pleural effusion or pneumothorax . There is redemonstration of right upper lobe scarring and upper zone lucency , reflecting known emphysema . A curvilinear lucency at posterior to the sternum on the lateral view may reflect a small pneumothorax . Nodular opacity in the left mid lung is stable since ___ . No acute osseous injury .
    OUTPUT:
    
1 . Equivocal small right pneumothorax . Short - term followup upright chest radiograph or CT recommended . 2 . Unchanged mild pulmonary edema superimposed on a background of moderate emphysema . No focal consolidation .